Rolando I meant no disrespect. I was very impressed with the image. I do think you have talent. The equipment used is "high-end" so it is not cheap and the...
Interesting. I would like to hear more about how temperature affect the focallength. I think another good reason for using aluminum is it high conductivity....
Please help out the group by doing the following. Keep posts trimmed so the length does not get out of hand. This really helps those who receive daily...
Refractors@yahoogroup...
Apr 2, 2007 3:35 am
21304
Gosh Roland back in the old days amateur photos almost always were pretty poor and most of that was due to tracking. No one could ever get it just right. In...
... It is ok to use a Cryford type focuser with roller in a Newtonian. In this scope's case the focuser stays horizontal and never really needs to pull the...
... I also saw no disrespect in Scott's posting. I thought the photo was quite nice and was going to say so when I caught your repost. I don't exactly get what...
H-alpha imaging is simply long, period. Especially when you use a camera like the STL11K which I happen to have, and not the more expensive STL6303, which is...
This is a bit off subject but I found it interesting. Following is a link to a Yahoo group for adapters to allow the Canon EOS cameras, including Digital...
Jim: I guess your grandma didn't go to grad school. Roland's OK. In the scheme of people with great knowledge interacting with those who have little...
Jim: No it does not mean they are better, and it does not mean they are worse. It does mean: 1. They have shorter lines AND 2. The used market behaves more...
We are certainly getting some insightful posts lately regarding the high end equipment market, and economics, IMO. The latest emailed update from the...
Here is a link for a U.S. source for some of these AF Focus Confirm adapters. They also carry versions for some other camera bodies. Rich Wood ... Canon ... ...
Speaking of focusing, the new Canon EOS 1D Mk III has a live view LCD a la that of the discontinued 20Da with magnification of 5x and 10x for more accurate...
Paul; For only $4500 without the lens according to the B&H web site, with May availability and a body weight of 40+ ounces. Definitely not your average DSLR. ...
... In the US of A the most readily available apo's in the late 80's were Takahashi's and not the Zeiss, prior to ordering my AP155 I visited the Tak dealer in...
... Hi Rich. Good quality and *low* price. Before A-P entered the APO market, if somebody wanted an APO refractor, they shopped for a Tak fluorite. Roland's...
Vahe; I believe that at the time probably 95% of TAK sales were their Fluorite Doublets. The triplets were outrageously priced IMO and I suspect relatively...
Hi Rich I remember from that era that the AP refractors were purposely made affordable to us amateurs by Roland. I had one of the NASA Glass re- fractors, and...
Wes; From some other posts I have seen the early AP scopes had some parts such as focusers which would not be considered acceptable in a good quality refractor...
You are absolutely correct Rich. My AP F9 had the Jaegers type black focuser with red plastic knobs. I recall the tube had one baffle, and the objective cell...
The difficulties faced by dob makers are not, in my opinion, due to the demographics of who is getting into the hobby. The hobby has always been biased...
... Greg; Not too sure I would agree with you on the demographics. When I joined the Eastbay Astronomical Society in late 1972 or so it had a very large...
I think there probably is something to the demographic arguments. The space race in the 60s spawned much interest in astronomy. We are in an era where the...
... I always wondered where did all these new and expensive scopes were going, I did not sense any substantial change in the number of folks willing to dish...
How about the prospective buyers that can no longer manage the weight and setup of the larger scopes? I've seen quite a few posts on other groups where a large...
For many consumer products there is a rather rapid move toward obsolescence. Computers are the prime example. Digital cameras and consumer electronics also...
From the posts on Cloudy Nights Forum a number of newbies are buying medium/low end refractors. The ones who stick with amateur astronomy will likely buy a...
Rich N
rnapo@...
Apr 5, 2007 3:43 pm
21330
Is this recession something you just declared? Individual sectors of the economy can and do slow, but as a whole economic indicators are actually quite strong....
Alan; I think that you quite possibly got it right. For the last 10 to 15 years there has been a wider range of high quality scopes available to the public...
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