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Michael Wainfeld
16-May-2009, 13:23
Hi-I've started to do some tests and I noticed that there are two lines between 200 and 400 on the Pentax Digital Spotmeter. What are we calling those? 266.6 and 333.2? 240 and 320?
Thanks-Mike
Bruce Watson
16-May-2009, 13:30
Hi-I've started to do some tests and I noticed that there are two lines between 200 and 400 on the Pentax Digital Spotmeter. What are we calling those? 266.6 and 333.2? 240 and 320?
Thanks-Mike

That would be 250 and 320. It's 1/3 stop increments.
Michael Wainfeld
16-May-2009, 13:38
Right- Of Course!-Thanks-Mike
Gem Singer
16-May-2009, 13:38
There are 1/3 click stops between all of the film speeds.

Not enough room to print every possible film speed on the little blue ASA dial.


As an example, Tri-X film with a box speed of ASA (ISO) 320. Guesstimate that the film speed is represented by ASA 200 + two click stops. Close enough.