Sequence viewing > black & white film - processing Index - Resource - ©
Lloyd Godman
DX
Coding system
Some
35 mm films have a silver and black stripe code
painted on the outside of the cassette and are
marked DX. |
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Through
a set of electronic contacts in the film compartment
of some cameras camera, when the film is inserted
this coding band automatically sets the ASA rating
of the film on the light metering system
with some cameras.
It
is a good idea to not touch these contacts as
skin oil can get on the contacts and create enough
resistance to give a false reading. |
|
Although helpful in that it is impossible to forget to set
the correct ASA of the film, this can become another limiting
factor of an automatic camera when a photographer wants
to deliberately set the ASA at a different setting, as with pushing or pulling film.
Want to learn more? - do a workshop or one on one with Lloyd Godman
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