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Re: [OM] OM telephotos.

Subject: Re: [OM] OM telephotos.
From: "Ulf Westerberg" <ulf.westerberg@xxxxxxxxx>
Date: Thu, 21 Jan 1999 20:43:36 +0100
Gary Reese wrote:

>I haven't had time to do the projected evaluations yet, but: The overall
>results with the 2X were worse than expected.  I'm going to have my first F
>rating: the 100mm f/2.8 w/ 2X at f/2.8 (5.6 effective).  The 300mm f/4.5 w/
2x
>at f/4.5 (f/9 effective) and f/5.6 (f/11 effective) are probably also an F.

I've used this combo a few times and, with lots of light so you can use it
wide-open at 1/125 sec on ISO100 film.
The result is, well, should I say questionable?
BUT the main problem here is not in optical theories, but in practice. 1/125
at f/9  and ISO100 is about as light as it gets in my part of the world IN
SUMMER. For winter use here, this is a joke, even with push-processing one
step or two. Oh, and yes, you've got hold the whole unit and squeeze it
gently while on a tripod, trying to use a cable release would mean severe
camerashake and disaster!

This is also the reason why I moving up to bigger gear. Stay tuned.

Ulf Westerberg


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