I'm back home now. After replying the first time to this post I thought it
might be time to recalibrate my diopter so I used that routine to at least
check for comparative screen grains. I've done that before and duly
reported that to my old eyes there's no discernible difference in the
coarseness of grains between the Oly and Beattie screens. Still no
difference to my even older eyes now, but then of course the old diopter
moved over another click this time so what do I see?
Apparently the Oly screens have a noticeably finer grain to eyes younger
and sharper than mine.
As for brightness, I don't see a ready test available to me on that. I
could swap my 24mm around to bodies with different screens, but that'd a be
an awful slow and inexact A-B method if you ask me, with memory and bias
playing large roles.
One thing I do know: using _either_ the Oly or Beattie plain-matte focus
screens with John H's "thirds" lines etched into them affords what I
consider to be a clear view of whatever scene's before me, and as always
and within reason the more light the better in that regard.
While away I was able to make a couple of tripod frames shooting Tri-X of
my father- and mother-in-law plus the wife, something to work on when I get
that roll back from the lab. I also finally broke down and began on my
first roll of Provia. I hope to have that film to scan within a week or so
to see how it interacts with the sort of light I tend to subject my
various emulsions to.
Finally, what sort of feedback are you prepared to give me re that
camera-shake experiment? If you'd relay to me the ground rules you have in
mind I'd be happy to perform this test independently on my end using Tech
Pan as the film medium, then post the result as an article.
Tris
www.tristanjohn.com
At 04:59 PM 2/18/2004 -0800, you wrote:
>Have you tried with say a 24mm lens or something shorter? I find the Oly
>2 series screens to work better with WA lenses, darkening less. The
>wider the lens, the greater the difference. This is from memory, now, as
>the Beattie is sitting in a drawer, replaced with a 2-4 some months ago.
>
>Moose
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