Hi John,
Where did you find a 2-13 for $36.95?
Thanks,
Joel
P.S. Did I tell you that I did in fact get the 200/F4 (that is, I've sent
the check for it; haven't received it yet)?
At 06:12 PM 5/27/1998 -0700, you wrote:
>Interesting observations, Winsor. I replaced the 1-13 in my OM-2S with a new
>2-13 about two weeks ago and have had almost the opposite experience. The
>difference in brightness was immediate, at all focal lengths and with both
>fast and slow lens. Both indoors and out, in bright and dim light, focusing
>and viewing was much easier. I also tried it with a 2X converter, which was
>definitely easier to focus. The split image and micro-prism were still
>useable even in dim light with fast lenses. The focusing aids do "disappear"
>in both dim and bright light, but to me this is an advantage as they do not
>detract from the image as with the 1-13. They're still there and easy to
>find if you need to use them. The ground glass portion is also much easier
>to focus. The image snaps in. I don't know if our different experiences are
>due to differences between the OM-4T and the OM-2S, as I don't own a 4T at
>this time to compare. All in all, I'm a very happy camper. It's the best
>$36.95 I've spent in quite some time. Definitely a recommended upgrade,
>IMHO.
>
>Winsor Crosby wrote:
>
>>I just got one of the new series 2-13 focussing screens. I installed it in
>>my OM4T. It has taken a while to figure out the difference. In most
>>situations I cannot tell any difference. In very dim light with a fast lens
>>the illumination of the focussing circle and the ground glass is the same,
>>so it is next to impossible to find the focussing aids in the middle. With
>>the old screen the focussing circle was lighter than the ground glass and
>>easy to see. You can focus either one using the ground glass in this
>>situation. In the old one the split image was usable in addition. (I was
>>able to do side by side with my OM1n)
>>
>>I could not detect any difference in brightness in normal lighting
>>situations. I even removed the lens from both bodies and held the
>>viewfinder of each camera to an eye to seen whether I could detect any
>>light level difference. Of course I realize that my eyes adjust
>>automatically. With the viewfinders held together(top to top) so that a
>>little piece of the field of each could be seen simulataneously it seemed
>>as if I could see difference, but it was hard to tell due to the
>>differences in the way the ground glass of each transmitted light. An
>>interesting phenomenon of the new screen is that without a lens in place
>>you can see blob-like colored shapes through it, but the old screen in the
>>same situation is evenly illuminated. Although I could make out the
>>granularity of the screens and some of the fresnel lines, I could not
>>subjectively say anything about the differences.
>>
>>Now here it is, the situation where the new screen seems to make a
>>substantial difference. I put a 2X teleconverter onto my 200/F4 yield an F8
>>combination and focussed inside the house on a dimly lit, deep book shelf
>>with some objects on it. With the OM1n and the 1-13 it was impossible to
>>focuss on a brightly colored striped kaleidoscope and just possible to
>>focus on a small silver candlestick. All focussing was done with the ground
>>glass because the focussing circle was blacked out. With the same lens
>>combination on the OM4T the focussing circle was also blacked out, but I
>>had no trouble focussing on the candle stick. It just popped in
>>effortlessly. I was even able to focus on the kaleidoscope without much
>>effort.
>>
>>My conclusion is that the new screens are good in dim light with really
>>slow lenses(maybe a 400/F6.3 or a 500/F8), or moderately slow lenses
>>combined with teleconverters. In most other situations there is no
>>appreciable advantage or even a clearly obvious difference. With a fast
>>lens in dim light, there may even be an advantage with the older screen
>>because the other focussing aid may still work and you can find where they
>>are.
>
>
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