Rat Notes: AP 160 First Light Comments Hi all, I received my new AP 160 F7.5 Air Spaced Triplet Apochromat Refractor on Tuesday, August 16th and I thought it...
... Rat, Thanks for taking the time to write up your first light thoughts. I own a TEC 140 but I must admit I "lusted in my heart" while reading your...
There is now an online article about Towa's 80mm f/15 achromatic refractor telescope. This scope was sold for about 20 years in the United States by a variety...
Hello John I don't have one of the scopes in question, but I really like the articles! Keep'em coming, please! Clear skies! Thomas Jensen, Denmark ... ...
There is now an online article about Unitron's famous (and rare) five-inch achromatic refractor. Although not a complete instrument, the article features the...
Hi again, John I also read the article covering the 5" Unitron. I really enjoy articles about telescopes so asking me if I like them is a bit like asking Chuck...
I am putting together an informative article about Roland Christen's original 5" apochromatic lens, a winner at Stellafane back in the early 1980s. It will be...
I am trying to track down the location and ownership of the John Mallas 4-inch Model #166 equatorial refractor telescope. As many of our user group members...
In a recent discussion on the tec-scopes group, Rich Wood quoted a ... This is something that has puzzled me for some time. If there are any Takahashi experts...
Hi Milt, I've owned a TOA-130 and a TEC-140 and a FS-152. The TEC is lighter. I actually found the much longer FS-152 an easier tube to move around! The TOA...
TNR has never been straight forward with questions people have posed and when there is someone who does pose a question that is straight forward there is ...
Hi Everybody, our homework is nearly done, just a few additional infos and export prices need to be shown, otherwise I have now completed the new APM Website...
Thanks Rob, Dwight & Simon for your comments, each of which added pieces to the jigsaw puzzle. Despite the weight, one can't argue with the results. In the...
... That particular 130 TOA lens had significant turned edge, a real problem for refractors since it results in soft images. The 150 TOA was the one with the...
I trust that all the TOA130's don't have turned down edges. As an amateur I would have thought any turned down edge would be hidden within the lens cell...
Good Morning Roland, ... I fully admit to not having your experience in reading turned edges on Ronchi patterns. However, I did note that your AP155/7 showed...
When judging turned edge from Ronchi images, you need to be able to differentiate between real turned edge and diffraction effects. Believe me, real turned...
... Thanks for your comments, Roland. For the record I do not own any Takahashi product - including accessories - and do not hold them in as high regard as...
I'm sure you're right about what you have seen. I tend to see scopes from people who want to know why they don't work as well as they should, so I probably get...
... An achromat can only focus sharply a very ... filters ... Yes, they would work in narrow band. Each color will have a somewhat different focal length. The...
Some of the worst and best optics I have seen from ... Hi RC :-), do you mean older discontinued triplets showing sometimes such strong zone in center, that a...
Milt can send you a adresse of a collector at the east coast, test 10 and find 5 with small to super worse deffects as you have not seen even in a chinese...
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