This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
Specifies a standard series of diameter sizes for the front part of a lens barrel and a standard series of thread sizes for the same front barrel. The data are applicable to lenses of cameras, enlargers and similar equipment. They are meant to simplify the production and storage of such auxiliaries as screw-in filters.
Buy this standard
|std 1 40|
|std 2 40||Paper|
A standard is reviewed every 5 years
Stage: 90.20 (Under review)
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