“Full Frame Equivalence” and Why It Doesn’t Matter

Started Feb 4, 2013 | Discussions thread
Detail Man
Forum ProPosts: 15,000
Like?
Proper Mental Hygiene for Equivalephobiacs
In reply to sean000, Feb 5, 2013

It seems pretty straightforward. None of it strikes me as evidence of a lack of "soundness of mind".

[1] To achieve the same FOV, divide the larger format system's Focal Length by the ratio of the image-sensor frame diagonal dimensions (the Crop Factor).

[2] In the specific case of equal framing, to get the same DOF, divide the larger format's system's F-Number by the ratio of the image-sensor frame diagonal dimensions (the Crop Factor). Otherwise, the DOF will be proportional to the F-Number that is used (relative to the above-described value).

[3] To get an indication of the effects of Photon Shot Noise on the Signal/Noise Ratio for the (equal framing and Total Light situation) described in [2] above, calculate the square-root of the ratio of the image-sensor Quantum Efficiencies (which is not likely to amount to highly significant differences).

[4] To get an indication of the effects of random Read Noise on the Signal/Noise Ratio at low image-sensor illumination-levels, have a look at the DxOMark Dynamic Range specifications for the camera.

How could some things so relatively simple lead to so much techno-tribal mono-formatic worship ?

Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow