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Planet Hunter 91mm CaF2 ?

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#1 moynihan

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Posted 25 February 2013 - 03:50 PM

Has anyone tried this one out, what ya think?

#2 tomharri

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Posted 04 March 2013 - 08:57 AM

I have the older Burgess 91 in fpl53 triple and its really good, 300x on Mars in Jan 2010 with great detail convinced me than this will be a keeper, was $999 new back then and f/6.6 at 600mm f.L.

#3 orlyandico

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Posted 04 March 2013 - 09:22 AM

My understanding is the Burgess 91 triplet is the same optical formulation as the early cemented AT90EDT. Although the later AT90's are air spaced.

But before buying anything from Burgess, make sure you will actually get something. Lots of bad stories there..

#4 Paul G

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Posted 04 March 2013 - 10:05 AM

Exactly, want to make sure the scope is in stock and pay with a cc so you can get a refund if the scope never shows.

The name is cute, Planet Hunter. At least they were honest and didn't call a 91mm scope a Planet Finder. :)

#5 tomharri

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Posted 04 March 2013 - 10:31 AM

My older lens is china sourced, this says 4-8 weeks delivery from manufacturer, so probably entire scope comes from there. My ebay buys from china have turned out ok so far.

#6 Adam Taylor

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Posted 04 March 2013 - 10:39 AM

The name is cute, Planet Hunter. At least they were honest and didn't call a 91mm scope a Planet Finder. :)


Or Planet Killer. ;)

#7 Daud

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Posted 04 March 2013 - 02:54 PM

With such long delivery time, you are out of luck with Paypal if something goes wrong. Credit card preferred.

#8 Jon Isaacs

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Posted 04 March 2013 - 03:04 PM

But before buying anything from Burgess, make sure you will actually get something. Lots of bad stories there..



:waytogo:

If it isn't in stock, don't do it. Google Burgess Optical Backpacker.

Jon

#9 Thomas A Davis

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Posted 04 March 2013 - 04:41 PM

The scope in question has nothing to do with the 91mm
triplet sold by Burgess. It is a air-spaced doublet that
I had the first one of. It had a fluorite main element,
and a lanthanum secondary element. Not cemented like the
triplet, and a good lens. I'm curious as to where this one
is coming from, unless Burgess has gone back in business,
or Bill is selling his personal scope.

I sold mine to a friend, and would not mind having it back.
The triplet had exceptional color correction, but it had
more off-axis coma than I cared for.

Tom

#10 Scott in NC

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Posted 04 March 2013 - 06:35 PM

I sold mine to a friend, and would not mind having it back.
The triplet had exceptional color correction, but it had
more off-axis coma than I cared for.


I'm just curious as to why one would want a refractor back that showed excessive off-axis coma? I'm guessing that the on-axis sharpness and exceptional color correction were more than enough in your mind to make up for that one aberration?

#11 Thomas A Davis

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Posted 04 March 2013 - 07:31 PM

Scott,

A bit of confusion on what I said. I never had the triplet,
which had coma. I had the doublet, which did not.

Tom

#12 Scott in NC

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Posted 04 March 2013 - 08:11 PM

Scott,

A bit of confusion on what I said. I never had the triplet,
which had coma. I had the doublet, which did not.

Tom


Okay, that makes more sense. Sorry, Tom, I guess I read your post too quickly! :foreheadslap:

#13 Thomas A Davis

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Posted 06 March 2013 - 02:33 PM

As an update on this situation, I called Burgess Optical
yesterday, and was told these scopes are available. They
are made by the same manufacturer as the one I had, and
can be ordered with a quoted 8 week delivery time at the
stated price in the ad. I had thought Burgess was gone,
but it appears they are back in business.

Tom

#14 terraclarke

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Posted 06 March 2013 - 03:03 PM

I think the AT102F11 "Planet Killer" would give that a darned good run for its money and for a lot less moolah. I love my AT102.

#15 Thomas A Davis

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Posted 06 March 2013 - 06:40 PM

The AT102 is an achromat, the Burgess Planet Killer is a
CAF2 fluorute doublet. I would find it hard to believe it
would outperform it. The Burgess has a lanthanum secondary
element, and zero color to my eye. I'm not trying to sell
any of these, but apples to oranges comparison.

Tom






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