Art and Science of Image critiquing 

Image Critique

 I have been a creator and moderator of a photo critique and sharing platform called CPA (https://creativephotoartist.org/) for last 14 years and the whole idea was to create a platform for photographers to share images and comment on them constructively. While the site has seen its good and bad days the whole crux of the platform was to provide a critique on the images and this made me wonder what is the best way to critique an image. This write up is all about science and art of image critiquing. 

In photography, we have use the term “photo critique” to judge an image and provide feedback to the photographer about that image!

Now, “judge” may be a strong word to use, but the term simply implies that we create a conclusion about something based on a standard. Now what is that standard there must be basis for that standard and what should be the basis for that judgement? 

In art forms which photography is one such form it becomes a subjective issue and we can’t keep subjectivity out of it and the same picture might be judged differently by different people. Some may critique based on technique and technicality, whereas others may use intuition. A few more will use pure bias or feelings, and there are those who will even critique based on their favourite colour. If we want to provide critique effectively, it’s good to be aware of what you’re using as your standards of judgment, even if they’re subjective. 

Is there a method? 

 Yes there is a method for giving critiques as well as receiving it and I will list out some of them. 

 For the critic: 

 First understand why you are giving a critique, here intention matters: Most of the time the author would have posted an image not only to get the viewers impression of it also to get the advice from the viewer with respect to what it means to him and how a picture can be improved. So the first intent of a person giving a critique should be as constructive as possible and explain what the pictures conveys to him and how it can be improved. Great care must be taken to avoid misunderstanding and sarcasm ( we see this a lot) , please do understand photography more or less in art form is a personal feeling, Sarcastic comment or a poorly written comment can be concluded as an assessment of the photographers ability (or lack of it) and it also reflects poorly on the critic as a person. 

 Some tips: 

  1. Study the image technically as well as aesthetically and take your time to understand the reasons behind the shot. Also consider asking these questions “What works? and “What does not work ?). 
  2. Analyse the image based on fundamental areas ( camera knowhow, composition, lighting, visual storytelling, subject selection, post-processing, and specific areas of study). 
  3. After studying the image , list out the technical and aesthetic qualities of the image that appeal and also that do not appeal. 
  4. Start the critique by writing what you like about the image. It is a misconception that a critique should only nitpick. 
  5. List out the technical and aesthetic qualities of the image that needs improvement. 
  6. Whenever possible offer suggestions and improvements. 

 Points to avoid: 

  1. Sarcasm: Being sarcastic and taunting is a strict NO. it indicates a person with high ego and narcissistic mentality and it’s of no use to the author. 
  2. Personal comments: Avoid making personal comments on the author; an image is not an reflection of a person. In civilized world personal attacks and comments do not hold any value and will undermine your intent. 

For the Photographer: 

Let us also discuss how we should receive a critique. First understand receiving a critique is all about learning and it’s feedback to improve. 

Points to consider: 

  1. Do not post images and expect only affirmation (Great Image , Lovely etc. ). 
  2. Respect the person who is critiquing the image, after all he is taking his time to critique an image. 
  3. Leave your EGO behind: we are humans and sometimes critiques can hurt your ego especially if it is negative feedback given by someone who you do not like or whose work you do not appreciate! Please remember every viewpoint is important to improve, photography is a viewer’s art, and every view should matter. 
  4. Study the critique and do the following:
    • What does the feedback tell me about what I can improve on?
    • Based on what I need to improve on, what specific skill in photography do I need to learn more about?
    • Ask questions if you do not understand and seek help 
  5. There might be times where you do not agree, do not get into arguments take it sportively. 
  6. Remember no comments is worse than negative comments. 
  7. Get sociable. 

Credits

https://www.naturephotographers.network/the-art-of-image-critique/

https://photzy.com/learning-the-art-of-effective-photo-critique/

Thanks if you like the blog, you can leave a comment at Home Page

Cheers

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Goutham Ramesh

Photographing Butterflies in Winter

It is a known fact   that bugs and butterflies don’t have the same far-reaching photo appeal as other natural subjects like things that are feathered or furred in savanna of safari.  They are also difficult to spot, and little challenging to shoot; However, in frame-filling close-up, insects are actually amazingly photogenic. I will talk about Butterfly photography in Indian winters*** in this blog. Butterflies are also fantastically beautiful and photogenic and you  can’t help but be seduced by their colour, intricate markings, delicacy and design and they’ve inhabited almost every type of environment and can migrate large distances – and in large numbers too .. so give it a shot!

**** When I say winter , I’m taking about India , especially south India, where you can still find lot of these small butterflies in winter!

Butterfly photography is easily accessible if you are an early riser and  you can spot them in a local garden or a grassland filled with shrubs:

In this blog I will share some of the images I shot this winter and also share some pointers on how to shoot them ( They are just my techniques and not really tips).

Most important thing you should do to shoot a butterfly is to  get up early and photograph them during sunrise especially during winters ; the winter mist makes them sluggish and that helps you to approach them. Ideally you need to photograph butterflies soon after they emerge when they are still in pristine condition and also note that the window of opportunity is brief – mistime your visit, and you may need to wait long  before you can try again.

Stalking is the best technique , This is when you follow (not chase!) butterflies around, waiting for them to rest, feed or bask. When they do, you need to efficiently move into position – just be mindful of the sun’s position; if you cast your shadow across your subject, you will likely frighten it away. 

At work
At work

What all Circus ..we do to get a picture .. from top right in clockwise :

1. Vinod on the ground shooting (PC Vinod)
2. Myself reviewing the image with a portable dark room ( garbage bag )
3. Grass jewel
4. Tawny Coster .
5. Myself on the Ground shooting an image ( PC Vinod)

Depth of field is inherently shallow at higher magnifications when using a macro lens , so there is no leeway for error when focusing. However, if you are using a tripod you can focus via Live View – something I always prefer to do when practical, as I’m able to magnify the live image and manually focus on the butterfly’s head/eyes with good  precision. A tripod also allows you to select a smaller aperture to achieve the depth of field needed, and – if necessary – use a reflector to light up  shadow areas. Alternatively if you use latest cameras  especially mirror less you can use focus peaking as an assisting aid.

Personally, I usually want my subject to stand out boldly against a nicely diffused, out of focus backdrop , with a Bokeh  so I will typically opt for the largest aperture possible (lowest f-stop number in my case its 2.8 ) Doing so also provides a faster shutter speed.

I don’t use flash on butterflies and prefer natural light  and I do use a reflector at times or a LED light for fill in, which is not as bright as flash and still allows me to fill the shadows a bit.

Finally, be patient… very patient. When shooting butterflies, be prepared for moments of complete and utter hair-pulling frustration. You wouldn’t believe the number of times a butterfly will disappear into the distance just at the moment you are about to trigger the shutter! However, thanks to subject knowledge, good technique, perseverance and a little lady luck, you can capture great images.

Image Gallery

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Cheers

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Goutham Ramesh

Laowa 100mm f/2.8 2x Ultra Macro APO -My Take

Background :

Recently I bought Laowa 100mm f/2.8 Ultra Macro for Nikon Mount  to compliment my aging Sigma 180mm F3.5 which is a brilliant lens by itself but its has started giving me problems with auto focus and since it is a discontinued lens I was forced to look at other alternatives.

This blog is all about my first take on the lens and not really a technical review ; For technical review pls visit

https://www.digitalcameraworld.com/reviews/laowa-100mm-f28-2x-ultra-macro-apo-review 

or look at many youtube videos like

https://www.youtube.com/watch?v=lkNOmMxOwIY

Please Note

  • I have not really tested this lens at 2X yet and may not really use it at 2x as I like lot of space in my images.
  • I have tested it on only Nikon Mount Nikon D750 Fx full frame body ; Only Canon EF version is equipped with a CPU chip and motor for aperture control via the camera. All other mounts are manual and aperture is controlled by the aperture ring on the lens.
  • The aperture gets deployed when shutter clicks, so while focussing you will have full brightness across F stops ( This is an issue only when an adapter is used )
  • Also I’m a hobby photographer and really do not have any association with Laowa ( would love to have one if I get to test their latest lenses  )  or any manufacturer and this is a not a paid review.

Specification

  • H/AI-Mount Lens/Full-Frame Format
  • Aperture Range: f/2.8 to f/22
  • Two Low Dispersion Elements
  • Maximum Magnification: 2:1
  • Minimum Focusing Distance: 9.7″
  • Manual Focus Design
  • Aperture Blades 9 (Canon); 7 (Nikon); 13 (Sony)
  • APS Equivalent 1.5x: 150mm; 1.6x: 160mm
  • No Front element rotation
  • Filter Size 67mm
  • Available Mounts: Canon EF, Canon RF, Nikon F, Nikon Z, Sony FE

Note : The lens comes with a UV filter and keep this on , removing this will expose the moving parts of the lens to weather.

Test Images and my take:

Testing Bokeh

First thing I do for with any lens is test Bokeh. The above shot was shot at 2.8 with a square LED at the back , as you can see the bokeh is smooth and round.

Bokeh at f8
Bokeh at F2.8

As you can see in the in above images the bokeh is perfectly round at 2.8 ! At F8 it is septagonal ( 7 blades ) , which is good with more blades it would have been more round , canon and sony mounts might give you near round bokeh.

Color Contrast

Color contrast is one thing I always suspected in this lens because my sigma gives an excellent color contrast and this lens did surprise me with color contrast and the contrast is very good.

Sharpness

The above image was for testing sharpness , here also the lens performed exceptionally well as you can see in the result.

Some More sample shots ( Let the images speak for themselves )

Neriidae this was on paddy grass
Exposure:
F2.8 , 1/600 , ISO 100, Natural light
Lynx spider with eastern honey bee kill.
Exposure:
F8 , 1/128 , ISO 100, Natural light
Long-jawed orb weavers
Exposure:
F8, 1/100 , ISO 400, Natural light
Hand of goddess
Exposure:
F8
Feet of Goddess Exposure:
F5.6
Exposure:
F5.6, 1/160 , ISO 400, Natural light

Some Points:

  • Focus : It is a Manual focus lens; Since manual focus lens are by design “not  designed” for faster focus the focus rotation is smooth and gives you longer rotation but  not much as I would have liked ( throw is about 60 degrees )!  However focussing is smooth and pictures are super sharp. If you are a photographer who uses manual focus like me, you will love this and for photographers who swear by AF and vibration reduction/image stabilization .. my advice is stay away from this lens and this is not for you guys
  • Build Quality: The lens has a solid, metal body with engraved markings. It measures 2.8 x 4.9 inches (72 x 125 mm) and uses the common 67mm filters. At 1.4 pounds (650g), it is fairly heavy. The lens is officially “internal focusing”, but that’s not strictly true. The outer barrel doesn’t extend, but the whole lens assembly moves inside the barrel, just like it did on older lenses. However to prevent damage to the inner components of the lens, Laowa ships it with a UV filter which should remain permanently attached to the front.
  • Aperture control : The aperture ring is located close to the mount. On most versions, the aperture can only be controlled on the lens, with no communication with the camera, but Canon’s EF version comes with a chip for aperture control and Pentax’s version uses a mechanical coupling for aperture control (thanks to the K-mount’s backward compatibility) However for a guy like me who started with Nikon FE, Pentax K1000 and Kiev-19 this is nothing new and It’s not a great disadvantage.
  • Sharpness and resolution:  Macro lenses come with high expectations regarding sharpness. In this regard, the lens  does not disappoint and the lens is sharp from f2.8 onwards till f22; However it performs best between f8 and f16 after which diffractions can be seen.

Thats it friends , I just wanted to share my experience and my take for detailed review there are many sources on the net.

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Cheers

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Goutham Ramesh

Natural Light Macro with my 180mm.

I usually do not give too much importance to the equipment, however if there is one lens that’s been close to my heart it’s been my beloved Sigma 180mm Macro EX HSM ; This lens has been with me for close to 2 decades and has given me great images. In this blog I will share some images shot with this lens in natural light.


Sigma 180mm Macro EX HSM 3.5, a brief overview:

The Sigma APO 180mm F3.5 EX DG lens was (yes, it is no longer manufactured) a telephoto/macro lens produced by Sigma Corporation.

  • Lens style:       Telephoto , Macro
  • Focal length:   180 mm
  • Maximum aperture:    f/3.5
  • Closest focusing distance :     0.46 m
  • Maximum magnification:       1:1
  • Minimum aperture:     32
  • Number of diaphragm blades :9
  • Auto focus type:         AF HSM
  • Lens Construction:     13 elements / 10 groups
  • Filter diameter :72 mm

What I liked about this lens!

  1. Shots  taken with this  lens were quite impressive.
  2. The shallow DOF.
  3. The  working distance has always been excellent.
  4. This lens performs extremely well even when the aperture is fully opened at 3.5.
  5. Excellent build , even though the powder coating matte finish peels off.
  6. Lovely Circular Bokeh at 3.5

Me , with my Sigma 180mm on field

Some techniques that I follow with this lens:

  1. Always stay parallel to the subject , this allows me to get the subject of interest in the shallow DOF that this lens provides
  2. Always use a tripod stand! This lens is heavy and is not for people who like to do handheld photography
  3. Use a Macro rail
  4. Use a right angle viewfinder , since most of the subjects are at ground level or very close to the ground, this helps a lot and saves my back as well.
  5. Start shooting with a fully open aperture and keep closing the aperture till i get right DOF
  6. Carry a white sheet of paper as a reflector to bounce natural light and use it to fill shadows.

Some Images:

Argiope in light drizzle. This was a challenging shot due to wind and I also wanted to show the raindrops ( Exposure : F14 , 1/125 second , ISO 400, Natural light )

Argiope after the drizzle . ( Exposure : F10 , 1/320 second , ISO 400, Natural light )

Owl Fly ( Exposure : F10 , 1/320 second , ISO 400, Natural light )

Owl Fly with Bokeh ( Exposure : F16 , 1/50 second , ISO 400, Natural light )

Plains Cupid , Here i have opened the aperture almost full to get a very shallow DOF and have gone almost parallel to the subject ( Exposure : F4 , 1/1250 second , ISO 800, Natural light )

Assassin Bug back lit with a paper reflector in the front ( Exposure : F8 , 1/125 second , ISO 400, Natural light )

Crab Spider back lit with a paper reflector in the front ( Exposure : F13 , 1/60 second , ISO 100, Natural light )

Red Veined darter back lit with a paper reflector in the front ( Exposure : F8 , 1/125 second , ISO 400, Natural light )

Assassin Bug back lit with a paper reflector in the front ( Exposure : F16 , 1/40 second , ISO 400, Natural light )

Back lit Tawny Coaster ( Exposure : F6.3, 1/1000 second , ISO 400, Natural light )


Rant!

These days , Macro photography has changed! ; The way we shoot pictures have also changed with good close up lenses , attachments , great diffusers and lighting support and there is a decline in people using natural light ( Even I don’t use this lens and natural light quite often these days ) . Today we can  get much more greater details in the images which is amazing. However personally for me charm of natural light macro is still very close to my heart even though I do shoot  a lot of my recent macro’s with close up attachments and diffusers  and I do love my Raynox and Radiant diffuser.

Having said that these days manufacturers have stopped making lenses like 180mm due to lack of demand and it’s very sad, one day I hope the demand for macro lenses and this focal length is back on track and we get to see some great macro images in natural light .


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Cheers

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Goutham Ramesh

Long Exposure Photography

Long exposure photography is  recently very popular , due to the dramatic effects produced with the technique. The advent of more advanced digital cameras have made it much easier to produce these images, since the calculations, guesswork and luck have mostly been eliminated from the process.

Long-exposure, time-exposure, or slow-shutter photography involves using a long-duration shutter speed ( from 1/15 of second to minutes ) to sharply capture the stationary elements of images while blurring, smearing, or obscuring the moving elements. Long-exposure photography captures one element that conventional photography does not: an extended period of time.


4 Second exposure to get the blur effect of this fountain on lake Geneva


As mentioned Long exposure is achieved by using slower shutter speed and this longer exposure times allow you to capture clouds, water, or other moving objects in a smooth, flowing manner, while maintaining sharpness and clarity on still objects.

One of the post important aspect to get longer exposure is  to shoot during early morning or late evening when light is little low; However we can also use an ND filter (Neutral density filter ) , which actually cuts down the exposure.

A neutral density filter essentially allows for this extended amount of exposure time, without altering the hue or colour of the image. Adding the filter is equivalent to stopping down one or more f-stops, and allows you to avoid making the photo too hot/bright due to the amount of time the shutter will be open.

Again as I said If you don’t have a ND or polarizing filter available, you’ll need to attempt these captures in lower light, such as in the early morning or late evening . Many photographers use long exposures to capture shots at night also!

Here the main objective is to increase your exposure time for the shot without overexposing the image!

Whether you use ND or get up early in the morning  using a “Tripod” is a must as these shots involve too much open shutter time to attempt holding by hand.


1/5 Second exposure , this was shot around 3 PM , so had to use ND Filter


How to start ( Some Tips )

Begin experimenting with very small apertures during the golden hour (the hour before sunset or after sunrise) such as f/22 or higher, and bump the aperture up to f/8 or larger after night falls.  Please note You’ll end up with several attempts, since nailing a great exposure is largely trial and error. You’ll also need to play around with exposure times, and this depends on what moving object you are capturing.


30 Second exposure to capture moving vehicle tail lamps at KR Circle Mysore


2.5 Second exposure to capture the flowing water


Waves at 1/6 second exposure


1.6 second exposure to capture the BG water stream


Clouds need much longer times to properly capture their trek across the frame of the shot; 5 minutes is a good place to start. Rolling or crashing waves at a beach require much less, sometimes 15 to 30 seconds is enough to create the necessary motion in the image.


20 second exposure at shiva temple Hampi , lit by a flash ( Light Painting )


Due to the sensitivity of the camera during exposure times of this length, a remote shutter release would come in handy. Anything you can do to minimize shake will help preserve the sharpness of the non-moving elements in the photo.


1/2 second exposure to create a blur effect of the moving mist on a lake


1 second exposure to capture the moving mist on a lake


Finally, be sure to do some pre-planning before actually clicking the shutter; try to visualize what the motion of all elements will be in your composition, including flowing elements (clouds, water, car lights), and still elements (rocks, buildings). This can help you better determine what settings you’ll need to capture the image you see in your mind


1/6 second exposure to capture movement of waves


0.4 second exposure to capture moving waves


0.6 second exposure to capture moving waves


Thanks if you like the blog, you can leave a comment at Home Page

Cheers

Goutham Ramesh

Hyperfocal Distance – A required technique in Landscape Photography

Hyperfocal distance can be a confusing topic, both for beginning and expert photographers. However, if you want to take the sharpest possible images, particularly landscape photographs, it is simply invaluable. In this blog I will try to demystify this topic.  

Please Note : Please note: Although the methods I present in this Blog are quite easy to understand, hyperfocal distance itself can be a complex topic. If you are a beginner, I highly recommend reading about aperture and depth of field before you delve into this Blog. Please read about exposure , aperture , shutter speed and ISO  here!

What is Hyperfocal Distance?

  • Hyperfocal distance, at its simplest, is the focusing distance that gives your photos the greatest depth of field. 
  • Hyperfocal distance is a distance beyond which all objects can be brought into an “acceptable” focus.
  • Hyperfocal distance is the focusing distance that provides equal sharpness between the foreground and background.

Role of Aperture

  • Hyperfocal distance of your lens will vary with aperture. Why? Think about it like this – if your aperture is wide, such as f/2, you will need to focus quite far away for objects at infinity to appear in focus. However, at a small aperture of f/11 or f/16, distant objects will continue to be sharp even if your lens is focused more closely. So, in this case, hyperfocal distance moves closer to your lens as you use smaller apertures.

Role of Focal Length

  • Hyperfocal distance of your lens will vary  with your focal length ,Your focal length also has a huge impact on hyperfocal distance. As you zoom in, your hyperfocal distance moves farther and farther away. For a 20mm lens, you may need to focus just a few feet from your lens to get the horizon (distant background at infinity) acceptably sharp. On the other hand, for a 200mm lens, your hyperfocal distance may be hundreds of feet away.

When to Use Hyperfocal Distance?

Not all photographs require that you focus your lens at its hyperfocal distance. Consider, for example, an overlook of a distant mountain. If you are standing on the top of the overlook and there are no objects in your foreground, it would be silly to try and calculate the hyperfocal distance, since your nearest object is effectively at infinity. Just focus on the distant mountains! And your aperture does not really matter either – since the closest object is so far away, you could shoot wide open if you wanted to (probably not a very good idea, since most lenses aren’t as sharp at wide apertures, but this is just in theory). Hyperfocal distance is only important to calculate when you have objects both close and far away from your lens that need to be sharp. Since you are actually focusing between these objects, neither is “perfectly” sharp; they are both simply close enough, or “acceptably sharp.”

Using a Hyperfocal Distance Chart.

One way to calculate Hyper focal distance is to use a chart , here is the chart for calculating hyperfocal distance

15mm at F16, HyperFocal distance of 2.5 FT

Here the Idea was to use stones in the water to be in sharp focus along with subjects in infinity . Shot at 15mm at F-16 made sure the stone was beyond 2.5 ft ( Refer the cart above )

Using Apps.

FotoTool ( Android ) :

FotoTool is a free application that contains several useful tools for both amateurs and professional photographers, This includes a tool to calculated HyperFocal distance.

https://play.google.com/store/apps/details?id=com.alfbishop.software.fototool&hl=en_US&gl=US

Simple DoF Calculator (iOS)

Simple DoF Calculator allows photographers to calculate the depth of field and hyperfocal distance for any given settings.

https://apps.apple.com/us/app/simple-dof-calculator/id301222730

How to use Hyperfocal Distance

  1. Choose a lens, and be sure to note the focal length that you are using.
  2. Pick an aperture value.
  3. Find the hyperfocal distance that corresponds to your chosen focal length and aperture.
  4. Focus your lens at the hyperfocal distance. This can be done by estimation, or by the focusing scale on your lens (if you have one).
  5. Now, everything from half that distance until infinity will be sharp.

Some Pictures using Hyperfocal distance

11mm at F22 , Hyperfocal distance of 1 ft

This is 11mm at F22 , Hyperfocal distance of 1 Ft .. So made sure the leaf is one feet away from the camera

15mm at F8, HyperFocal distance of 5 FT

This is 5mm at F8 , Hyperfocal distance of 5 Ft , so made sure the rock is on5 feet away from the camera


Credits

https://photographylife.com/landscapes/hyperfocal-distance-explained

https://en.wikipedia.org/wiki/Hyperfocal_distance

Thanks if you like the blog, you can leave a comment at Home Page

Cheers

Goutham Ramesh

Basics of Exposure in Photography

One thing you will hear a lot about as you start your journey into the world of photography is Exposure.  So, what exactly is exposure? 

Exposure is the amount of light captured by the image sensor of a camera.  If too much light gets to the sensor, the picture is washed out or too bright.  Conversely, if not enough light gets to the sensor, the image will be underexposed or too dark.

Most cameras have a light meter built in that will automatically determine the correct exposure, but when you know the three basics of exposure and how to use them, you can set your camera on manual, go rogue, and get some very AMAZING results.


Let’s take a look these 3 aspects of Exposure:

Aperture

The size of the lens opening, measured in f/stops.  Aperture controls the depth-of-field which is the area that is in focus in the picture FOR A GIVEN MAGNIFICATION! ( SAME F-STOP WILL NOT LOOK SAME IN DIFFERENT FOCAL LENGTH ! PEOPLE USUALLY GO WRONG HERE ) .  Aperture can be used to draw attention to one part of the picture (like the BUTTERFLY BELOW) by blurring the foreground and background with a large aperture opening.  One thing to remember is that the f/stop numbers are smaller for larger openings and the numbers are larger for smaller aperture openings i.e. f/1.4 is a large opening and f/22 is tiny. 

Look at the images below to see the difference of aperture at same magnification and focal length of 180mm.

Shot at F16
Shot at F11
Shot at F3.5

As you can see , the opening of aperture reduces the DOF ( Depth of field ) , Sometimes a fully open aperture works wonder but you should be aware of shallow DOF and keep parallel to the DOF plane to make sure the subject of interest is within the DOF.


Shutter Speed

The amount of time the sensor is exposed to the light measured in fractions of a second.  Shutter speed can be used to freeze a subject with a fast speed of 1/250 or faster or it can be used to blur motion with a slow speed like 1/4.  You can also adjust shutter speed to capture images in low light scenarios IE: increasing the amount of time the camera sensor is exposed to the image/light.  In this situation, you usually need a tripod so that you don’t blur your photograph ( TRIPOD IS AN IMPORTANT GADGET, IF YOU CAN USE IT , PLEASE USE IT)

Shot at 1/2000 of a second

In the below picture the bird was too fast and i wanted to freeze it skimming through water so used a very high shutter speed!

Shot at 1 Second

I wanted to create a blur effect of water flowing , so used a I ( One ) second exposure.


ISO

The light sensitivity of the image sensor.  The smaller number (like 100) is considered low and is not very sensitive, and a number like 1600 is high and is very sensitive to light.  The higher the ISO speed, the faster the camera gathers light, but it also adds noise to the photograph.  Most of the time you should keep the ISO at the lowest setting if there is enough light around you to get the shot you want.  Sometimes though, the only way to get a shot is to crank up the ISO.  A noisy shot is better than no shot at all.

ISO 2500

Since this was shot before sunrise and I wanted to capture the night sky with stars , I had to increase the ISO to 2500 so that camera gathers light faster


Conclusion

So with these three components of exposure ( APERTURE, SHUTTERSPEED AND ISO ), you can combine them in all sorts of ways to bring out your inner Artist! And in the process,  If you like the results of the combination, then who can say it is  not the correct exposure?  That’s what I love about photography.  It’s up to you!


Thanks if you like the blog, you can leave a comment at Home Page

Cheers

Goutham Ramesh

Bokeh

A good photograph is all about the subject  is what people say — but what about the background? My friend Murali Santhanam ( http://framesofmind.co.in/ ) always says it’s the background that makes a picture.

In this blog , I will talk about a background effect called Bokeh!

What is It ?

Bokeh comes from the Japanese word boke,  which means “blur” or “haze”, or boke-aji, the “blur quality.” Bokeh is pronounced BOH-Kə or BOH-kay.

Visit any photography website or forum and you’ll find plenty of folks debating the pleasing bokeh that their favourite fast lenses allow. Adjectives that describe bokeh include: smooth, incredible, superb, good, beautiful, sweet, silky, and excellent… but what exactly is it?

Bokeh is created by using aperture effectively ( Usually wide ) to render a busy background into a soft expanse of colour, turning small points of light into soft circles.

The red-veined darter at F8

Some Points :

Aperture: To achieve bokeh in an image, you typically need to use a fast lens—the faster the better ( But i use all kinds of lens including lensbaby ). Ideally you’ll want to use a lens with at least an f/2.8 aperture, with faster apertures of f/2, f/1.8 or f/1.4 being ideal, Many photographers like to use fast prime lenses when shooting photographs that they want visible bokeh in.

Lens: Although bokeh is actually a characteristic of a photograph, the lens used determines the shape and size of the visible bokeh. Usually seen more in highlights, bokeh is affected by the shape of the diaphragm blades (the aperture) of the lens. A lens with more circular shaped blades will have rounder, softer orbs of out-of-focus highlights, whereas a lens with an aperture that is more hexagonal in shape will reflect that shape in the highlights.

Don’t worry if you don’t own a very fast lens. By increasing the distance between the background and your subject, you can see bokeh in images that are shot at smaller apertures like f/8, You will see many images here shot at different apertures.

Grass Blue

How ?

To increase the likelihood of creating visible bokeh in your photographs do the following

  1. Increase the distance between your subject and the background. You can do this by decreasing the distance between the camera and subject. The more shallow the depth-of-field, or further the background is, the more out-of-focus it will be. Highlights hitting the background will show more visible bokeh too, so if you’re using a backlight, side light or a hair light, the bokeh may be more pleasing to the eye.
  2. Choose a background with visible highlights ( Sun through foliage is what I use most of the times )
  3. You’ll want to shoot with the lens wide open, so you’ll want to use a shooting mode of Aperture Priority or Manual. Manual gives you the ability to choose both your aperture and shutter speed, whereas Aperture Priority allows you to choose the f/stop while the camera chooses the appropriate shutter speed for the exposure. I usually shoot in Aperture Priority mode and start with fully open aperture
Small Grass Yellow at F6.3

Some Quick Tips:

  • Use fast prime lenses
  • Long focal length creates more extreme bokeh
  • Shoot lenses wide open
  • Increase distance between subject and background
  • Move closer to your subject
  • Take close-up portraits and macro images in nature
  • Use a backlight, side light, or hair light

Some Images :

Tawny Coaster
Tawny Coaster at F6.3
Lynx Spider at F16
Tawny Coaster at F6.3
Grass Yellow at F13
Blue Ground Skimmer at F10
Snails at F16
Hump Nosed Viper at F8

Credits :

https://www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/bokeh-for-beginners.html

https://en.wikipedia.org/wiki/Bokeh

Cheers,

Goutham Ramesh