"Off the top of my head, I can name John Gregory, who was offering Mak and apo systems, but that was short lived, and has been doing government optics for...
Barry told me that there is very little demand any more for large achromat refractors (5" and up). The cheap junk Chinese short refractors have just about...
These people who have bought the cheap junk short 6" refractors, will I think, be moved to buy a better refractor. If they go to star parties and look through...
rnapo
rnapo@...
Apr 1, 2005 11:41 pm
14500
No, I'm afraid that the amateur community is going down a different path. On many newsgroups people literally salivate at the thought of upcoming cheap Chinese...
... star ... up. ... I'm quite dubious about this Rich. The problem isn't quality but size. Yes, some observers love (still do) the D&G because of its fine...
... Hi Ron, You and Roland are likely right. I've seen several people in our astro club buy them (cheap junk 6" achros) and dump them after a short time but...
rnapo
rnapo@...
Apr 2, 2005 12:24 am
14503
In a message dated 4/1/2005 5:16:48 PM Central Standard Time, chris1011@... writes:(snip for the concerns of Pat Kelly): This came up on the TMB List...
Roland you may mix up the E Objective ( achromat) with the Type A. The Type A is a douplet short flint apo. I have here a 6"F/17.5 and its not only a stunning...
Ups, Roland , you may forgot the real nice Carl Zeiss Jena Cometfinder C- Type Achro 110 mm F/750 mm, that lens show how a fast achromat should be made. I have...
Hi Markus, Yes, I may be in error about the A objective. I have seen the design of several different Zeiss achromats, and I thought that this one used the...
I agree that fast achromats, when designed and made well, can be quite good performers. I have not seen any good examples of that from Chinese sources. All the...
... D&G did produce a doublet apo and it was listed in their catalog about 10 years ago, if I am not mistaken it was a 5.1" F/9, evidently they did not sell...
... all ... about ... Thanks Vahe for the info. Did you remember what was their price like compared to AP and Tak and Meade ED at the time? I would speculate...
In a message dated 4/2/2005 1:22:26 PM Central Standard Time, vahe@... ... D&G did produce a doublet apo and it was listed in their catalog about 10...
Roland in the Book Astro Optik is published the glas used in that old Zeiss lenses. When I am back in the office on monday, I can mail you the glas types of...
From time to time you can find even in the chinese achromats real good samples, but in general the words are valid: you get what you pay for. China makes what...
I have had 2 of such D&G apos, if my memory service me right the OTA with nice 2.7" focuser was about $ 2,000, but cosmetic of the glas from polish was not...
I wish I had the bottomless pockets you all seem to have... then perhaps I could get in on nitpicking really nice scopes to pieces and complain about every...
Hi All, I have owned two D&G refractors, a 6" F/15 and an 8" F/12. Both proved to be fine planetary scopes with minimal false color. Barry's lenses are ...
There is now an online article about Unitron's vintage 4" f/15 Model #152 equatorial refractor. It is found by using yahoo or similar and typing in:...
They looked great in the ads with all the guide scopes and finder scopes attached to the main OTA. I likely wouldn't have bought my APs if I had not lusted...
rnapo
rnapo@...
Apr 2, 2005 11:59 pm
14521
... Thanks for the tip, Kurt. I knew you can get the Feathertouch for the TV-102 (and NP101). The link is for the adapter between the Tele Vue and...
... Never fear Warped... Pockets fill and empty all the time...private school for two emptied mine and I sold my Tak and AP's for the D&G and a beefed up...
In a message dated 4/2/2005 2:43:58 AM Central Standard Time, rnapo@... writes: That's great news. ... an ... selling ... web ... Hi Pat, I just noticed...
... as f/15. ... true. I would ... You can save a lot of money on a mounting if you opt for an older (used) equatorial mounting aimed at the larger reflector...
In a message dated 4/3/2005 11:50:28 AM Central Standard Time, chris.b@... writes: You can save a lot of money on a mounting if you opt for an older (used)...
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