I never thought this would be the case, but siphoning off
something like 15% of light is barely detectable by the human
eye (it's - what - less than half a stop? Try seeing the brightness
difference when looking though your f/2.0 lens by stopping
DOF preview down to f/2.3 or so...).
The biggest difference I have found is somehow the flare-resistance
and 'crispness' of the viewfinder. The OM-1 viewfinder with a 1-series
screen is wonderfully bright, but (and maybe it's just the lack of
dioptric correction + my eyes not being great anymore) noticeably
"softer" with less contrast. The viewfinder also flares quite badly,
giving a misimpression of how much the lens would flare in the
actual photo.
The 3/4-series viewfinder is somehow more contrasty with less flaring,
at the expense of being a bit smaller. I can focus manually with much
greater accuracy. The biggest difference is towards the edges. With my
OM-1, focusing a fast lens (especially wide angle) on a subject at the
very edge of the frame is somewhat hit-or-miss. With an OM-3 and 2-
series
screen, it's absolutely perfect. Also, an OM-3 with 2-series screen is
worlds (not just slightly, or a bit, but WORLDS) brighter and better
than
an OM-1 finder. It's a night or day difference. I have used my OM-1s
daily
for two years, with a large assortment of different screens (the 1-8
being
the best in brightness and smoothness for all non-wide-angle uses) so
I should know.
This change has been so profound that it has altered my overall
impression
of the capability and resolution of the OM lenses. Even the slightest
focusing
error diminishes a lens' apparent performance, and with the 3Ti I have
simply
not yet seen a single mis-focused shot, it's surreal. So it's been a
free
upgrade to all my lenses :-)
Dawid
On 10 Jul 2010, at 2:07 AM, Chris Crawford wrote:
> The 1-13 isn't bad at all in an
> OM-1 since that body doesn't siphon off light from the mirror to
> direct it
> down to the meter cell in the mirror box like the OM-4/3/2s models do.
--
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