Tim;
You are correct. I use an OM-1 exclusively for IR.
George
HI100@xxxxxxx wrote:
>
> Acer wrote:
> << You can also do what George did: get a Wratten gel filter
> and place it
> on the film rails. No light loss to the eye. >>
>
> I seem to remember George's post dealt with IR where exposure requires a
> fair bit of trial and error? In any case he probably used manual exposure. I
> don't remember whether he discussed this issue for OTF auto : but with the
> b/w film and using OTF exposure the filter on the rails operates twice for
> the exposure measurement (at least at shutter speeds <1/60) but only once for
> the film. This means you must dial in a filter correction to increase film
> speed to make up for added light attenuation. Having to do this is a big
> nuisiance as you then must check that the shutter speed is <1/60. (At high
> shutter speeds the filter is in measurement only once! ) If you use the
> filter up front on the lens everything is taken care of automatically at all
> speeds.
>
> Tim Hughes
> Hi100@xxxxxxx
>
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