Nice one Sassan.
Now for something we all take for granted in the digital world.
That is the ability to instantly review the shot ( chimp ). Back in the days of film the only option was to use Polaroid film in a seperate camera body.
Although Polariod film was per shot an expensive option it was used paticularly in a studio environment for lighting/composition checks. Also useful for determining the shot a client might want especially when they are standing over your shoulder and are not quite sure of what they really want. Lots of experience of this one.
With medium format cameras with detatchable backs like my old Bronica SQA, this is no problem as film backs could be instantly changed, with the film being protected from accidental exposure by a darkslide. Polaroid backs for medium format are fairly straight forward. As the polaroid film is on the film plane they require no special optical elements so cost little more than a standard roll film back.
With 35mm however it is a different story. Due to the shape of the camera body it is impossible to get a polaroid film pack on the film plane, and so any back needs to contain an optical element to bridge the gap. The simplest if you can call it that was the NPC polaroid back. This used a fibre optic block to achieve that, but the downside of this back is that the final image is only 36x24 mm, the size of the film gate. The device was therefore quite an expensive option for such a small image view. The requirement existed though, as these were produced for a wide range of camera models.
Link to NPC site
http://www.gwdigitalandphoto.com/proback2.cfm
Mikami overcame the image size problem specifically for Nikon F and F2 series by developing a special polaroid back. The Speed Magny.
Necessarily it was quite a bulky device, with the image relayed from the film gate through a lens onto a 45 deg silvered mirror. From that it passed through a Nikon enlarging lens onto another larger 45 deg silvered mirror which projected the image onto the polaroid film.
Two links from mir.com and you need to scroll down a bit on each one to view the Speed Magny.
http://www.mir.com.my/rb/photography...htm#SpeedMagny
http://www.mir.com.my/rb/photography...agic/index.htm
An additional link from the Nikon Historical Society, at the bottom of the page shows a Nikon F with the Speed Magny attatched and a resulting polaroid shot.
http://akiroom.com/redbook-e/kenkyuk...kai200709.html
Don