Difference between revisions of "Talk:Diaphragm"
Steevithak (talk | contribs) m (note about confusing definitions of manual vs preset diaphragms) |
('preset' as I understood it) |
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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. | 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. | ||
<br/>[[User:Steevithak|Steevithak]] 13:57, 7 January 2012 (PST) | <br/>[[User:Steevithak|Steevithak]] 13:57, 7 January 2012 (PST) | ||
| + | :My recollection is that "preset" always referred the two-ring style of aperture control: one ring without detents that actually closes the diaphragm; the second with detents but unconnected to the diaphragm—just providing a stop, as you twisted the first ring to close down to shooting aperture. --[[User:Voxphoto|Vox]] 14:32, 7 January 2012 (PST) | ||
Revision as of 22:32, 7 January 2012
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)
- My recollection is that "preset" always referred the two-ring style of aperture control: one ring without detents that actually closes the diaphragm; the second with detents but unconnected to the diaphragm—just providing a stop, as you twisted the first ring to close down to shooting aperture. --Vox 14:32, 7 January 2012 (PST)
