Kumusta* Carlos!
Thank you!. Your technical comments on Fernando's experiment
is impressive. The explanation on "why the longer exposure for MC
lenses seems very logical.
*Filipino word for How are you
----- Original Message -----
From: "Carlos J. Santisteban Salinas" <cjss@xxxxxxxxxxxxx>
To: "Lista de correo Olympus" <olympus@xxxxxxxxxx>
Sent: Wednesday, May 19, 2004 4:17 PM
Subject: [OM] Re: Long exposure capability of OM2n
>
> 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>
>
>
>
> The olympus mailinglist olympus@xxxxxxxxxx
> To unsubscribe: mailto:olympus-request@xxxxxxxxxx?subject=unsubscribe
>
> To contact the list admins:
mailto:olympusadmin@xxxxxxxxxx?subject="Olympus List Problem"
>
>
>
The olympus mailinglist olympus@xxxxxxxxxx
To unsubscribe: mailto:olympus-request@xxxxxxxxxx?subject=unsubscribe
To contact the list admins: mailto:olympusadmin@xxxxxxxxxx?subject="Olympus
List Problem"
|