Talk:Single-lens reflex camera
- SLR cameras also avoid the difficulty of parallax in close-up photography.
This sentence needs expansion. I have a SLR (Nikon FM2) and have read the Nat'l Geographic Field Guide, and have a tickling in the back of my mind--can almost remember what that would mean, but not quite. So I'm certain that the average person who reads this article will also not know what it means. A good article otherwise. --KQ 17:08 Sep 5, 2002 (PDT)
In fact we should include an article on rangefinder cameras. But my english is too poor.
- I'm not remembering how parallax comes into play on other cameras in closeups. ... I guess I should dig out my Field Guide and see if I can clarify it myself--but I wanted first to be certain that I understood. --KQ
Too be simple what you see in the finder is not what you get on the film. The problem has no importance if the subjet is 1.5 m away or more but became more and more critical the closer you get.
In the 50's SLR camera like exakta we're tricky to use and were mainly used for macro while press photographer used mainly rangefinder camera.
by the way the rangefinder is also a system based on parallax....
The problem is that, from slightly different positions, objects are in diferent angular positions (close on eye, the the other). In a SLR camera you see what you get, from the same position: no angular difference, in a viewfinder camera, the viewfinder and lense are a bit appart from each other: objects are in different angular positions, for close object, that could mean the difference between being in and out the picture.AstroNomer 17:36 Sep 5, 2002 (PDT)
- Ah. Thanks, both, for the explanations. :-) --KQ
NOTE: The image showing the principle of the SLR is wrong, I'm afraid:
- To get the image correct wrt mirroring, the light path in the pentaprim is like a "4".
- The mirror is significantly shorter.
- The focussing screen is not shown.
Egil 12:16 Jan 28, 2003 (UTC)