I should think focussing the sun or moon would be easy since they are at
infinity. Exposure for the moon is usually about the same as bright
daylight, that after all is what is illuminating it, f11 @ 1/film-speed
should give good exposure with negative film. Solar photography is a rather
specialized field, would depend on what kind of neutral density filter you
are using, I guess.

Plain matte (ground glass) screens should be fine for most shots above. For
more specialized astro stuff a clear screen (plain glass) is the way to go.
Clear screens usually have a small crosshair in the center for aiming and
focusing the telescope, or a microscope. Clear screens give the brightest
possible viewfinder image.

Ciao,
graywolf

----- Original Message -----
From: Joseph E Ringer III <[EMAIL PROTECTED]>
>
> I don't use the meter on the moon or sun, I've got my trusty tables.
> :-)  When focusing I find the split ring/microprism collar distracting
> and useless. I'd much prefer a plain matte screen as I read that it's
> easier to focus something like the sun or moon on a fine matte than a
> clear screen??? BTW, I don't do deep sky which is why I'm not looking
> for a brighter screen just an unobstructed one. I hate when I frame a
> sunspot group the way I want but can't focus because the group is
> under or obscured by the ring/collar.
-
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