Talk:Diaphragm shutter

message: There is a discussion at Talk:diaphragm (optics) about various similar terms with separate articles on Wikipedia, and trying to clarify what these terms all mean (from a confused amateur photographer!)... Carcharoth 23:25, 18 May 2006 (UTC)
replies: text: I think that's a real bad idea to move this shutter confusion into the diagphragm article.  I'd say reject the idea of merging with diaphragm, and merge into shutter instead.  This obscure old term doesn't deserve its own article. Dicklyon 04:26, 19 May 2006 (UTC)
thread_title:  Discussion at [[diaphragm (optics)]] 

message: While following up "What links here" for leaf shutter, I found a weird Stargate reference. At Iris (Stargate), the iris-like structure was described as being like a leaf shutter, and I changed it to diaphragm shutter. From looking at the pictures on the Stargate page, especially at the GIF of it opening and closing here, can anyone confirm whether I have got this correct?
:I think that's a terrible idea.  Here we are struggling to find anyone who knows what the disused term diaphragm shutter really means, and you go and link something to it that may or may not be one, substituting a largely unknown disused term for a commonly understood term.  As far as I know, there is no optical shutter that works like an iris diaphragm as shown in your stargate picture.  I'd call it an iris diaphragm instead, and get rid of the shutter refererence altogether, since it doesn't resemble any known shutter.  Dicklyon 17:54, 20 May 2006 (UTC)
replies: text: OK, maybe I was too quick to jump in there. But I'd disagree that that structure resembles an iris diaphragm. It opens from, and closes to, zero aperture. To my mind that disqualifies it from being a diaphragm, unless you allow diaphragms to have zero aperture. Also, it opens and closes - that seems to me more like a shutter (moves during use) than an adjustable diaphragm (only moves when being adjusted between use). Carcharoth 10:55, 21 May 2006 (UTC)
replies: text: Why do you think they call it the iris?  And can you show me any example or reference of an iris that closes all the way to act as a shutter?  I don't think so; it's entirely hypothetical that that's what a diaphragm shutter is; none of the actual things I've seen referred to as diaphragm shutters resemble an iris diaphragm like the iris stargate does.  Dicklyon 03:38, 25 May 2006 (UTC)

text: Thank you, as I'm too lazy right now to do it. But it's true: all shutters which use leaves to block the aperture are leaf shutters, whether they have 1 leaf or 7. ==ILike2BeAnonymous 23:37, 19 May 2006 (UTC)
thread_title:  Strange Stargate reference... 

message: A diaphragm shutter is mentioned at Argus C3 if that helps... Carcharoth 11:31, 20 May 2006 (UTC)
replies: text: Interesting.  And it's NOT a central shutter in that instance. Dicklyon 17:30, 20 May 2006 (UTC)
replies: text: Yes, but again, nobody (practically speaking) in the photographic world uses the term "diaphragm shutter" to refer to the "brick"; they'd call it a leaf shutter. Check around the Web to verify this. (Same with the term "central shutter"; it's an overly-pendantic term which I doubt is even used in McKeown's.) ==ILike2BeAnonymous 18:12, 20 May 2006 (UTC)
thread_title:  [[Argus C3]] 

message: I found this about leaf shutters. But that is just another wiki site. A far more helpful, in fact a very helpful PDF document overview of camera shutters is here: Google HTML conversion of Andrew Glassner’s Notebook, link to PDF version of Andrew Glassner’s Notebook. The latter PDF link includes diagrams that should clear up any confusion. Carcharoth 11:10, 21 May 2006 (UTC)
thread_title:  Some more links