Hola Dado, hola Fernando, hi all.
>Thanks a lot for this very informative result of your experiment on OM2's
>low light exposure capability. I'm very sure many readers would be
>interested to know about that results.
[snip]
>My observation is that with MC lenses, exposures are longer, contrary to the
>belief that multicoated lenses transmit more light.
A possible reason would be the light scattering (?) caused by the higher
reflections on the SC glass -- *maybe* such a puntual light source is
somehow 'less detectable' than a slightly spreaded one.
However, exposure variation from SC to MC, according to these tests, is
*negligible*: the higher difference in the same batch was 1/4th of a stop,
and all the rest were around 1/6th of a stop -- the ISO speed of different
batches of the *same* film may differ up to 1/3th of a stop, a higher
difference than all of Fernando's results.
Most important, if the slides are coming back OK, just don't worry about
the meter ;-)
Oh, a few words about reciprocity failure... this has a noticeable effect
on 'classic' films (most B&W, for instance) although not that terrible. But
several modern films (Kodak E200, Fuji Sensia 400) have almost *no*
reciprocity failure at all -- at least within exposure times up to a few
minutes, as the OM's can manage.
Hope this helps,
...
Carlos J. Santisteban
<cjss@xxxxxxxxxxxxx>
<http://cjss.galeon.com>
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