That is (currently) their largest Pentax astronomy telescope. I suppose it
could be a smc PENTAX M67 800mm F6.7 ED [IF] repackaged, but I hope not.
Astronomy telescopes need only to perform at their best at infinity and
(hopefully) wide open since that's all you get. Camera lenses, on the other
hand, have to exhibit reasonably flat field, be reasonably rectilinear, and
have reasonably low coma, etc. over a range of distances. Note: the gross
optical formula for the Pentax 125 SDP - 5" f/6.4 APO Refractor is 4
elements in two groups. I couldn't find the formula for the smc PENTAX M67
800mm F6.7 ED [IF], but even if similar I'd still expect optical
differences. Note that initial distribution is through OPT in Oceanside, CA.
FYI 800 mm is perfect for prime focus imaging Andromeda with a K20D sized
sensor.
Regards
Bob...
---------------------------------------------------------------
"I don't mind if you don't like my manners.
I don't like them myself. They're pretty bad.
I grieve over them long winter evenings."
-- Philip Marlowe (Humphrey Bogart)
From: "AlunFoto" <[EMAIL PROTECTED]>
Well they have this:
http://www.optcorp.com/productImage.aspx?pid=8730
Looks suspiciously like a modded 6x7 optic... :-)
2008/9/30 David Savage <[EMAIL PROTECTED]>:
... to add something like this to their lens line-up:
<http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=180294096815>
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