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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