Talk:Diaphragm

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Revision as of 21:57, 7 January 2012 by Steevithak (talk | contribs) (note about confusing definitions of manual vs preset diaphragms)
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Discussion pages are for discussing improvements to the article itself, not for discussions about the subject of the article.


Need better sourcing

We need to find some references for this page. I see the definitions I original posted have drifted and the first two now seem to conflict (or at least the distinction is no longer clear).

My understanding (which is very possibly flawed!) is that a manual diaphragm is one that is continuously adjustable and does not have detents (presets). A preset diaphragm is a like a manual except that is has detents (presets). Also a preset may optionally have a 2nd ring for preview purposes and the preview ring operates like a manual diaphragm (i.e. continuously variable). I don't have any good authoritative sources to back this up at the moment. If anyone can source this, please do so and correct the definitions if needed.
Steevithak 13:57, 7 January 2012 (PST)

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