Last time we have talked about bright focusing screen, now I found that the
bright and easy focus FC that came with the used OM-4 I got from a
professional photography was a Canon E-Series "E-C" screen. It took me a
long time to find it out because I didn't notice that the E-Series FC from
Canon have different brightness, I had got a E-screen with Grid lines that
was a "Laser-matte" while the "E-C" was "New Laser-matte", which is much
brighter than the old one.
The E-C is very cheap, I paid US$34 for two, they are now installed in my
OM-4 and 4Ti. The B&H price is $19.95, with slight modifications it works
very well with OM3s and 4s. I rate it very fine and brightness is between
OM's 2-series screen and Minolta 7000 series screen.
C.H.Ling
-----Original Message-----
From: C.H.Ling <chling@xxxxxxxxxxxxxx>
To: olympus@xxxxxxxxxxxxxxx <olympus@xxxxxxxxxxxxxxx>
Date: Wednesday, April 21, 1999 9:37 PM
Subject: Re: [OM] Cleaning Screens
>There were some threads concerning the brightness of focusing screen before
>without any conclusion, here I have some data just measured with my OM4Ti
>and 50/3.5, target to a light color wall, place a light meter behind the
>viewfinder and take some readings with four different FC (with comments on
>the smoothness of screen) :
>
>OM4Ti with
>
>OM 2-4 --- 4 +0.6EV (extremely fine)
>Minolta 7000 --- 4 +0.3EV (fine)
>Canon EOS 620 --- 3 +0.7EV (very fine)
>OM 1-4n --- 3 +0.1EV (coarse)
>
>OM2n with Canon EOS 620 screen --- 4 +0.2EV
>
>Other observations:
>
>- With large aperture lenses, the brightness between different FC is less.
>Some people said the OM series 1 and 2 screen look no different, they might
>have used a 50/1.4 and compared with OM4 and OM2n.
>- Minolta 7000 FC is not as bright and fine as OM 2 series FC but focus
>better with large aperture wide angle lenses.
>- I own a Beattie screen before, (by memory) it is very similar to Minolta
>FC, but it vignette with my 16mm fisheye. If you can find a used Minolta
>FC, it is a more cost effective approach.
>- The finer the screen the better it works with small aperture lenses, a
>200/f4 with 2X-A works very well with the OM 2 series screen, but not so
>good with large aperture wide angle.
>
>The Canon screen I damaged is the best I have ever seen, it is extreme
>fine, the brightness is close to the OM 2 series screen but focus equally
>well with wide or tele lenses, I will try to find out what it is later.
>
>C.H.Ling
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