New photos/text at <http://tech.groups.yahoo.com/group/sct-user/files/LX200-OTA-disassembly/> Original style LX-200 Classic dec. sleeve bearing (with thust ...
Hello All I own a Bausch and Lomb 8" SCT - which Uncle Rod claims is a vamped up Dynamax 8". It's pretty obvious he doesn't like this scope. So I'm in the...
I own a C11 and love it. As with most things, some people need to have the newest technology, and the C11 is becoming a bit dated. Since it's an alt/az mount,...
No claim to it. It's based on the Criterion design. Criterion wound up in the hands of Bauch and Lomb in the mid 80s. As for the scope, I'd-a liked it if I...
I used to use my C14 mostly with Hyperstar, but recently I tried to go back to some higher resolution imaging at around f7. Previously I used Canon 40D, and 4...
Hi Hugh, I've had one for several years and it's great. Any Alt-Az scope is only good for short exposures because of field rotation. You need to get a...
On an SCT what would cause an asymmetry, wherein on one side of focus the secondary shadow is perfectly centered, but off-center on the other side of focus...
And the only commercial field de rotator I now of was designed for the Meade LX200 and will not work with the NS. Peace, Rod Mollise Rod's new book: _Choosing...
Hi Greg, Interesting you should ask this! It's one of the topics in a small new book I'm doing about SCT collimation. To answer the question, it's either a...
There are a heck of a lot of these scopes out there ...so finding one for sale is usually not a problem except in my case when I looked and looked then just...
Let me add that there are a few good B&Ls...the 8001 scopes...but those are it. Peace, Rod Mollise Rod's new book: _Choosing and Using a New CAT_ Available...
Looks like its time for me to buy a copy. When you say misaligned primary, do you mean not centered correctly round the baffle, or do you mean that there is...
I mean the tilt of the primary is off. You can actually get away with an off-centered primary, because it is SPHERICAL, as long as it's tilted correctly. A...
Seeing was very good this morning. But transparency was very poor! My histogram reading was only 40% at 1/15s exposure time and 100% gain! But because of...
... "Mr. President, that's not *entirely* accurate." I've done imaging quite successfully with my alt-az setup up to 30 seconds to a minute. Depending on...
Yes, I totally agree. There are patches of sky that display little or no rotation for portions of the night. You probably need some astronomy software to...
There is a graph on Doc Gs website... http://www.mapug-astronomy.net/ragreiner/rotators.html#Graph Mark 2009/7/2 Chris Rowland <chris_group_mail@...>...
Excellent work Chris...keep them coming. Two questions: When do you sleep? Do you have a tutorial on your methods of planetary imaging? Thanks, Bob [Non-text...
field rotation is a "definite issue" limiting exposures to 30 seconds or so on mounts that are aligned on zenith wehn you're at N American latitutdes. My...
Bob: Well this problem is episodic, near as I can tell. What do I mean by episodic? I mean that I have the problem when I collimate, but when I run around...
... Part two - now that I've disconnected OTA/stub axles/forks...the thrust bearing on one fork arm...did not have a steel thrust bearing washer between the...
... Sounds like mirror flop - that inherent design problem you find in most mass-produced, moving-main-mirror scopes. So far I've seen two causes of main...
I did a small animation from Toulouse (France) in the 1st of July, from 4h30 AM to 5h30 AM (european time = TU+2). Each picture is the result of a 600 frames...
Hi Greg, you are correct. I would tighten the main mirror lockring a bit if you can. make sure your secondary screws are snugged finger tight, and that the...
Greg- Field rotation with equatorial mounts is a bit tricky, because the amount of rotation you get depends on where you are pointing your scope. To analyze ...
Optec makes one: http://www.optecinc.com/astronomy/pyxis.htm I think you can use that with any scope if you have the right software controlling it. But I also...
Hi Bob, I wake up every 2 or 3am and grab a few image then go back to sleep. It could be tiring at times but I get use to it. I don't really have a tutorial...
I routinely do just a polar alignment (not a drift alignment), and can go easily 4-5 minutes without any detectable rotation. Over time, the subs will show...
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