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Anonymous Mon 06 Feb 2023 21:31:46 No.4136816 View View Reply Original Report

Quoted By: >>4136820 >>4136822 >>4137038 >>4137049 >>4137066

New to photography
Can someone explain the relevance of flange distance and diameter?

Anonymous

Anonymous Mon 06 Feb 2023 21:39:25 No.4136820 Report

Quoted By:

>>4136816
it's not important at all unless you want to adapt lenses from one camera to another and maintain good image quality, then you need about the same diameter or smaller and a longer flange distance on the original mount

the difference between small and large mounts is like the ability to make an f/0.7 50mm and an f/0.6 50mm. 0 relevance to actual photography.

Anonymous

Anonymous Mon 06 Feb 2023 21:41:47 No.4136822 Report

Quoted By: >>4136849

>>4136816

Small diameter results in more vignetting unless there is a large flange distance like on Nikon F-mount.

Anonymous

Anonymous Mon 06 Feb 2023 22:33:02 No.4136849 Report

Quoted By: >>4136931

>>4136822
not even true

Anonymous

Anonymous Tue 07 Feb 2023 01:37:11 No.4136931 Report

Quoted By:

>>4136849
where do snoyboys get their medical grade copium from?

Anonymous

Anonymous Tue 07 Feb 2023 04:58:24 No.4136987 Report

Quoted By:

The point is to get the light from the rear element onto the center. Ideal is to have rear element diameter same as mount hole diameter and same as sensor diagonal, so that light rays fall straight on the sensor. Anything less than that and filter stack bends the light. And of course the closer rear element to sensor the better.

Anonymous

Anonymous Tue 07 Feb 2023 09:00:47 No.4137032 Report

Quoted By: >>4137048

Short flange with small mount MAY cause mechanical vignetting with adapted long lenses.

I have personally never seen it though.

Anonymous

Anonymous Tue 07 Feb 2023 09:14:18 No.4137038 Report

Quoted By:

>>4136816
These are important numbers that show how cucked the lens options are for some systems. A number listed in this table inevitably leads to vignetting, narrow-aperture, large and expensive lenses - read severly compromised lenses - for the system in question. So why does this table exist at all? Without it, photography wouldn'tbe possible at all. My cardboard pinhole camera does worse in every regard.

Anonymous

Anonymous Tue 07 Feb 2023 10:12:30 No.4137048 Report

Quoted By:

>>4137032
The smallest current mounts diameter is still wider than full frame diagonal distance, even if light came out completely parallel (a "worst case" scenario for your statement) it would still have absolutely zero effect.

Anonymous

Anonymous Tue 07 Feb 2023 10:12:59 No.4137049 Report

Quoted By:

>>4136816
For adapting lenses from other mounts you want body mount have diameter about same or larger, and shorter distance.
Generally moar diameter allows wider aperture without vignetting and less distance allows shorter focal length without retrofocus design.
Longer focal length lenses without telephoto design will be a bit longer of course.

Anonymous

Anonymous Tue 07 Feb 2023 12:00:45 No.4137066 Report

Quoted By:

>>4136816
the more direct the light into lens onto sensor the better the image quality, cameras with small mounts have to bend light in weird angles which is unnatural and requires a lot of correction

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