Thanks for that Jeff, you reminded me that I have been confusing the 1-8
screen with the 1-4 and 1-10. If I have given anyone the impression that
1-8 = 1-10 without the grid lines, I was wrong (not for the first time).
--
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Jeff Keller
Sent: 10 May 2005 16:58
To: olympus@xxxxxxxxxx
Subject: [OM] Re: eSIF availability
It's not just your eyes. Neither the split image nor standard microprisms
work beyond about f6.
I experimented with quite a few screens. The 1-8 and 2-4 seemed to be nearly
equal and definitely better than the 1-4. The 1-8 is useless with a wide
angle lens. Everything seems to be in focus. I tried the 1-7 but wasn't able
to focus it as well as the 1-8. It seemed to fall between the 1-8 and 1-4.
I've since got a better 1-7 but haven't repeated the test. My first 1-7 had
several scratches and I wondered if the microprisms were damaged. If you've
got the time to use it, I would recommend using the varimagni finder along
with a well matched screen (1-8,2-4,1-7?). But IIRC there is a list member
who posted some shots using the 500/8 handheld ... my hat's off to him.
More of an FYI than an alternative to the Zuiko. Celestron has/had a 750mm
f6 that can be focused using the split image center of a 1-13 screen. The
lens is light but is much bigger than the Zuiko. They also often have a haze
on the front element. I'm not sure how hard it is to clean (yet). I'm quite
happy with it even with the haze. They normally sell a little under $200 on
yaBe.
-jeff
> -----Original Message-----
> From: John Nelson
>
>
> While I'm here, may I ask for suggestions as to the best focusing
> screen to use with a newly acquired Zuiko 500mm f/8?
> I currently have the standard
> 1-13 but middle-aged eyes and microprisms don't seem to work very well
> together!
>
> --
>
> John Nelson
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