I was able to get one thanks to Jeff--had an OM T-mount adapter.?? :-)) I
missed a couple snipes prior to that.? They seem to come up on yabe every 6-18
mos or so.? The Op-tech hood gizmo is great when walking around with it or to
store it.? I have a dew shield to use as a hood.? I use it as an a "bald eagle
/various critter" lens.? Last Feb it was 10 deg and blowing and there was an
eagle 20 yds away near the Chain bridge in Amesbury.? I had a super view but
the wind was too much to get a sharp image.? It made for a reasonable spotting
scope anyway though froze my butt off.
Thanks for the CAT design review.
That would be an interesting pair-up. The Celestron, being a Schmidt-Cassegrain
design, should have a leg up on the Questar as regards coma since the Questar
(like most small mirror lenses) is a Maksutov design. However, Celestron is a
mass-market producer relative to Questar. Final finish and QC might trump the
design advantage. Of course, coma is a function of fast optics so the superior
design of the Celestron would already be under stress from the Questar being a
slower optic. The Celestron should also suffer more from diffraction being a
faster optic with a larger central obstruction.
So, who has a Celestron 750mm f/6? I wish I did. My only Celestron is 2000mm
f/10. I think the 750 f/6 probably hasn't been made for 30 years.
usher99 [at] aol.com wrote:
Wonder about relative performance compared to the Celestron 750 F6. Focusing at
F8 might be a challenge.
But I recall that that lens is quite the performer. My spending priorities are
elsewhere, but that price is reasonable considering the quality of the
lens--minus the broken parts, of course.
Themed Olympus Photo Exhibition: http://www.tope.nl/