Originally Posted by
genghis2510
The camera is the forerunner of the Nikon F body series (35mm SLR).
Nikon EMs are small compact 35mm film SLRs with proprietary small Nikon lens – not compatible with the F series Nikon bodies.
ASA and ISO are one and the same. ASA stands for American Standards Association. ISO stands for International Standards Organization.
In the film era, ASA/ISO were used as film sensitivity rating to light (exposure). The higher the ASA number the more the film is sensitive to light. A film with ASA 400 – 800 rating was used for low light / night photography with no consideration for texture or coarseness of the photo. In DSLR, coarseness may refer to “noise”. Also, high ASA film was used in sport photography to achieve high stopping shutter speeds.
A film with lower ASA rating such as ASA 64 or ASA 25 was used for slides with finer grain prints. A well lighted subject or scene can be captured in fine resolution print using film with lower ASA/ISO number – lower than ASA 100 which is the de facto all-purpose standard in 35mm film photography.
A 35mm SLR loaded with ASA rated film can be set with only one ASA. Unlike today in DSLR, the user can set his camera to different ISOs depending on the light situation and the need for higher or lower shutter speeds. Quite handy.
For further inquiry, the world wide web is at your disposal.
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