Spend that retirement fund early
Gee, at only $12K maybe I should get three... ________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Mon, March 22, 2010 1:51:13 PM Subject: [Utah-astronomy] Spend that retirement fund early http://cgi.ebay.com/R-E-Brandt-12-Refractor-Telescope-Lens-in-cell-RARE_W0QQ... _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
It has been listed "many" times and doesn't seem to be able to find a taker.
Date: Mon, 22 Mar 2010 12:54:00 -0700 From: josephmbauman@yahoo.com To: utah-astronomy@mailman.xmission.com Subject: Re: [Utah-astronomy] Spend that retirement fund early
Gee, at only $12K maybe I should get three...
________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Mon, March 22, 2010 1:51:13 PM Subject: [Utah-astronomy] Spend that retirement fund early
http://cgi.ebay.com/R-E-Brandt-12-Refractor-Telescope-Lens-in-cell-RARE_W0QQ... _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com
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It would have a very limited list of potential buyers. You could get a reflective optic with better imagery at that aperture for less than $2K. On Mon, Mar 22, 2010 at 1:56 PM, Steve FISHER <sfisher01@msn.com> wrote:
It has been listed "many" times and doesn't seem to be able to find a taker.
"Reflective"? Here we go, somebody grab the popcorn! ;)
Date: Mon, 22 Mar 2010 14:04:15 -0600 From: chuck.hards@gmail.com To: utah-astronomy@mailman.xmission.com Subject: Re: [Utah-astronomy] Spend that retirement fund early
It would have a very limited list of potential buyers. You could get a reflective optic with better imagery at that aperture for less than $2K.
On Mon, Mar 22, 2010 at 1:56 PM, Steve FISHER <sfisher01@msn.com> wrote:
It has been listed "many" times and doesn't seem to be able to find a taker.
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It's a garden-variety achromat, loaded with color. Enjoy your popcorn. It's also definitely a collector's item, however. I remember seeing it on there a couple of years ago (and think I even posted here about it). Not sure if it's the same seller this time around. On Mon, Mar 22, 2010 at 2:08 PM, Steve FISHER <sfisher01@msn.com> wrote:
"Reflective"?
Here we go, somebody grab the popcorn! ;)
Hard to compete with Astrophysics when it comes to refractor lenses.
It would have a very limited list of potential buyers. You could get a
reflective optic with better imagery at that aperture for less than $2K.
On Mon, Mar 22, 2010 at 1:56 PM, Steve FISHER <sfisher01@msn.com> wrote:
It has been listed "many" times and doesn't seem to be able to find a taker.
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I don't think Roland has ever made a 12" lens triplet. Maybe I'm wrong. I own 2 APO's, but my largest is 100mm. Huge refractors are not the most portable scopes you will encounter. On Tue, Mar 23, 2010 at 12:11 PM, <erikhansen@thebluezone.net> wrote:
Hard to compete with Astrophysics when it comes to refractor lenses.
8' is plenty big, my experience with big long refractors is one of "shaky images", the f7 refractors Roland makes are well mounted as well. Many of the "spotlight prints" are photographed using his refractors. Big refractors are only practical when mounted in an observatory like the Andy out at SPOC. I don't think Roland has ever made a 12" lens triplet. Maybe I'm wrong.
I own 2 APO's, but my largest is 100mm. Huge refractors are not the most portable scopes you will encounter.
On Tue, Mar 23, 2010 at 12:11 PM, <erikhansen@thebluezone.net> wrote:
Hard to compete with Astrophysics when it comes to refractor lenses.
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People have forgotten the folded refractor, unfortunately. It's such a viable approach, especially considering modern enhanced-reflectivity coatings. Combining a large APO with a 2-mirror fold would yield a very portable, easily-mounted telescope, handling in practice much like a Newtonian. On Wed, Mar 24, 2010 at 8:51 AM, <erikhansen@thebluezone.net> wrote:
8' is plenty big, my experience with big long refractors is one of "shaky images", the f7 refractors Roland makes are well mounted as well. Many of the "spotlight prints" are photographed using his refractors.
Big refractors are only practical when mounted in an observatory like the Andy out at SPOC.
I saw a nice folded refractor at RTMC a few years back, it did preform reasonably well.
It seems a Newtonian with mirror low to the ground is inherently more stable than a folded refractor in that the balance point will always be high above the ground. People have forgotten the folded refractor, unfortunately. It's such a
viable approach, especially considering modern enhanced-reflectivity coatings. Combining a large APO with a 2-mirror fold would yield a very portable, easily-mounted telescope, handling in practice much like a Newtonian.
On Wed, Mar 24, 2010 at 8:51 AM, <erikhansen@thebluezone.net> wrote:
8' is plenty big, my experience with big long refractors is one of "shaky images", the f7 refractors Roland makes are well mounted as well. Many of the "spotlight prints" are photographed using his refractors.
Big refractors are only practical when mounted in an observatory like the Andy out at SPOC.
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Don't think of a folded refractor in terms of a Dob mount or equatorial fork. They are more suited to a classic GEM, or a Springfield mount. On Thu, Mar 25, 2010 at 10:12 AM, <erikhansen@thebluezone.net> wrote:
I saw a nice folded refractor at RTMC a few years back, it did preform reasonably well.
It seems a Newtonian with mirror low to the ground is inherently more stable than a folded refractor in that the balance point will always be high above the ground.
The one at RTMC was about 10ft long instead of unfolded 20ft, it was on a dob mount.
Don't think of a folded refractor in terms of a Dob mount or equatorial
fork. They are more suited to a classic GEM, or a Springfield mount.
On Thu, Mar 25, 2010 at 10:12 AM, <erikhansen@thebluezone.net> wrote:
I saw a nice folded refractor at RTMC a few years back, it did preform reasonably well.
It seems a Newtonian with mirror low to the ground is inherently more stable than a folded refractor in that the balance point will always be high above the ground.
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Looks like Siegfried's chance to reclaim the "Largest Refractor in Utah" title. patrick :) On 22 Mar 2010, at 13:51, Chuck Hards wrote:
http://cgi.ebay.com/R-E-Brandt-12-Refractor-Telescope-Lens-in-cell-RARE_W0QQ...
Bob and Siegfired have the best refractors, why worry about the biggest?
Looks like Siegfried's chance to reclaim the "Largest Refractor in Utah"
title.
patrick :)
On 22 Mar 2010, at 13:51, Chuck Hards wrote:
http://cgi.ebay.com/R-E-Brandt-12-Refractor-Telescope-Lens-in-cell-RARE_W0QQ...
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I think it's a compesation issue. [?] I love both my APO's, but they are hardly "light buckets". On Tue, Mar 23, 2010 at 12:14 PM, <erikhansen@thebluezone.net> wrote:
Bob and Siegfired have the best refractors, why worry about the biggest?
I think they are sweet scopes. It's just a bummer they get so expensive over 120mm. They also don't have the 30% + obstruction of the primary element, and having no secondary elements eliminates optical alignment problems. I think this is why smaller apo's have a better astrophotography reputation than medium/larger reflectors. Mike Clemens posts on the cloudy nights dslr imaging forums. He shoots with a TEC200mm F9 ED refractor. The images he captures are amazing. http://www.pbase.com/mclemens1969/galaxies If I had the funds, I would switch to a 150mm apo in a heartbeat. On 3/23/10 11:39 AM, Chuck Hards wrote:
I think it's a compesation issue. [?]
I love both my APO's, but they are hardly "light buckets".
On Tue, Mar 23, 2010 at 12:14 PM,<erikhansen@thebluezone.net> wrote:
Bob and Siegfired have the best refractors, why worry about the biggest?
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You must differentiate imaging from visual. A visual reflector can get by with a tiny secondary obstruction. And even an 8" APO refractor isn't going to cut it for the really faint fuzzies, visually. That said, I agree with you 100% where imaging is concerned. That's the reason I bought my 80mm and 100mm EDs. Even a 120mm ED scope is a chunk of change ($1.5K-ish), although the prices have been dropping lately (someone please tell TeleVue...lol) On Tue, Mar 23, 2010 at 12:54 PM, David Rankin <David@rankinstudio.com>wrote:
I think they are sweet scopes. It's just a bummer they get so expensive over 120mm. They also don't have the 30% + obstruction of the primary element, and having no secondary elements eliminates optical alignment problems. I think this is why smaller apo's have a better astrophotography reputation than medium/larger reflectors.
Mike Clemens posts on the cloudy nights dslr imaging forums. He shoots with a TEC200mm F9 ED refractor. The images he captures are amazing.
http://www.pbase.com/mclemens1969/galaxies
If I had the funds, I would switch to a 150mm apo in a heartbeat.
participants (6)
-
Chuck Hards -
David Rankin -
erikhansen＠TheBlueZone.net -
Joe Bauman -
Patrick Wiggins -
Steve FISHER