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Subject isolation: wide aperture or postprocessing?

vitalishe

Los Alamos, US
396 posts

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vitalishe Silver Member Nikonian since 27th Dec 2012
Wed 27-Nov-13 09:48 PM

"Fast" lenses with wide apertures are good for low light and subject isolation. I want to focus on the later one. Suppose the amount of light is NOT an issue.

How would you compare photos taken with wide aperture vs a smaller aperture and then the background blurred in postprocessing?
- Clearly, postprocessing will take longer. So, if you do it often and you are paid for it lenses like 24 f/1.4 could be justified.
- On the other hand, blurring can be done selectively. Instead of taking a picture at f/1.4 and slightly missing the focus on the eye, one can take the same picture at f/4 and blur the image in post.

What other issue do you see?

Is it a good idea to take the same photo at wide aperture for a chance to get the image right in camera and then at smaller aperture to have more info just in case the first one was a bit of? Or is this a waste of time?

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