"EV" - is it a universal thing?

Sirius Glass · Oct 9, 2020

swchris said:
Actually, this post is wrong for my Hasselblad and Gossen Profisix combination. On the ProfixSix the EV changes when I change the ISO setting. Therefore I can read out the EV value and just set it on the lens.

Actually you are wrong. What I stated is correct for the Pentax Digital Spot Meter. Do you have one? Do you use one? Have you tested one? You do not know what you are talking about. Alan Ross demonstrated why it has to be done that way for the Pentax Digital Spot Meter.

BrianShaw · Oct 9, 2020

Why the rage, Steve.. your talking one meter (that only correctly displays EV at 100) and ProfiSix calculator does that PLUS corrects when a different film speed is in use. Apples and oranges. Both correct except ProfiSix actually easier to use in the full spirit of the coupled EV shutter concept. Alan Ross was correct for a Pentax Digital Spotmetet, but not for a ProfiSix... or a WestonIII either.

AgX · Oct 9, 2020

If a meter shows EV (or whatever...) only for ISO 100, what use is it then?
But then I stand corrected, on stating that all meters with such scale have it coupled to the film speed dial.

BrianShaw · Oct 9, 2020

AgX said:
what use is it then?

Limited use.
From an EV perspective...

AgX · Oct 12, 2020

AgX said:
If a meter shows EV (or whatever...) only for ISO 100, what use is it then?
But then I stand corrected, on stating that all meters with such scale have it coupled to the film speed dial.

Some people might take the numbered scale at meters, where one has to read a number pointed at by the needle and transfer that to the dial, as EV/LW/LV scale.

Well, as the steps between these figures coincide with one stop, and as they typically start at 1, at one certain film-speed setting that number scale indeed can be used as EV/LV/LW scale.
But its use is limited. For any other film-speed setting one would have to calculate for right results.

radiant · Oct 12, 2020

EV is a great unit since it is same as stops. If EV goes from 8->9 you know to compensate one stop at exposure.

.. and you can measure exposure range in stops really easily just by measuring in EV.

Stephen Benskin · Nov 18, 2020

This is probably a little late for the discussion, but it might be of interest. Allen Stimson, An Interpretation of Current Exposure Meter Technology, Photographic Science and Engineering, Vol 6, Number 1, January-February 1962.

Sirius Glass · Nov 18, 2020

Stephen Benskin said:
This is probably a little late for the discussion, but it might be of interest. Allen Stimson, An Interpretation of Current Exposure Meter Technology, Photographic Science and Engineering, Vol 6, Number 1, January-February 1962.

Thank you. Now I have a reading assignment.

"EV" - is it a universal thing?

Attachments

Privacy & Transparency

Privacy & Transparency