The heat setting step prevents the film from shrinking back to its original unstretched shape and locks in the molecular orientation in the film plane.
22.
TTL OTF flash exposure control is more precise than previous methods as it measures the flash exposure at the film plane rather than at the flash itself.
23.
For example, it is not uncommon for the rear element of a retrofocus lens of 18 mm to be more than 25 mm from the film plane.
24.
The ratio of the subject size on the film plane ( or sensor plane ) to the actual subject size is known as the "'reproduction ratio " '.
25.
When the camera is closed, the pressure plate moves back from the film plane, thus allowing the film strip to move freely to advance to the next frame.
26.
The flange to film plane distance was deliberately made as short as possible to accommodate as many different makes of camera lenses as possible using separately-sold lens adapters.
27.
Accessories : Genuine leather case, microscope adapter, M24 lens mount TO M39 lens mount adapter for Zenit SLR lenses, with flange to film plane distance of 45.2 mm.
28.
These pellicle mirrors reduce the amount of light travelling to the film plane or sensor and also can distort the light passing through them, resulting in a less-sharp image.
29.
Retrofocus lenses or inverted telephotos, which have greater clearance from the rear element to the film plane than their focal length would permit with a conventional wide-angle lens optical design.
30.
The Brownie 127 was a simple bakelite camera for 127 film which featured a simple meniscus lens and a curved film plane to compensate for the deficiencies of the lens.
