When do you use a high f-stop like f/22 to f/32?

2 months 3 days ago #666890 by Chase Audate
I thought the smaller the aperture, the better the DOF.  So I put my camera on a tripod, use a remote switch and the images still look not so sharp on a big screen.  Then what I have noticed is I move my aperture to something wider and seems seem to correct themself.  

So why would you use a higher f-stop like f/22 or f/32?


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2 months 3 days ago #666893 by Shadowfixer1
Look up "diffraction". That is what you are seeing with the small f-stop. Read about it and you will begin to grasp why this happens.

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2 months 3 days ago #666922 by Prago
I very rarely will go beyond F 16 simply because defraction becomes a pain in the you know what.

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2 months 3 days ago #666941 by effron
Agree, not too often do I pass f/16.....

Why so serious?
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2 months 3 days ago #666947 by fmw
When do you use a high f-stop like f/22 to f/32?

When you need the depth of field those apertures provide.  I use f22 for my tabletop small product shots because viewers prefer to have every part of the product in acceptable focus.  In the 4X5 film days we used f64 and camera movements for this kind of thing.


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2 months 2 days ago #667003 by Ozzie_Traveller

fmw wrote: When do you use a high f-stop like f/22 to f/32?
....... In the 4X5 film days we used f64 and camera movements for this kind of thing.


G'day matey
Yes - I remember my 4 x 5" sheet film days too ~ scary back then to have a 2-sheets of film magazine and 4 magazines to cover the job.  Wow - haven't things changed :beerbang:

Phil from Downunder


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2 months 2 days ago #667005 by Nikon Shooter
Honestly, only when shooting with wider angle lenses
than 35 mm. with anything over 200mm, never ever.

Light is free… capturing it is not!
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2 months 2 days ago #667071 by fmw

Ozzie_Traveller wrote:

fmw wrote: When do you use a high f-stop like f/22 to f/32?
....... In the 4X5 film days we used f64 and camera movements for this kind of thing.


G'day matey
Yes - I remember my 4 x 5" sheet film days too ~ scary back then to have a 2-sheets of film magazine and 4 magazines to cover the job.  Wow - haven't things changed :beerbang:

Phil from Downunder


Indeed.  Not much "bracketing" in those days. (:


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2 months 1 day ago #667141 by Otto F
All above really get it right. Lens distortion is the culprit when you get higher up.


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2 months 1 day ago #667181 by garyrhook

Otto F wrote: All above really get it right. Lens distortion is the culprit when you get higher up.


But this didn't. Lens distortion is not the same thing as diffraction.

Here's an interesting article:  https://photographylife.com/what-is-diffraction-in-photography


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