... regarding ... or ... organization, ... ready ... If you think CS is bad, try MEAD in Irvine. It only took 3 months for them to finally decide they...
Thanks to the help recieved on this board, I was able to find an even more flexible alternative than the stock reducer. I ordered the AP 2" compression ring...
I suspect the lack of comment is caused by the fact that everyone has been laughing hard for the last 20 hours or so, and can't seem to stop.... Yes of course...
This was a frustrating night! It was partially cloudy with fast winds. It was also cloudy only at the area around Jupiter! It alternated between over cast...
Rod, I haven't laughed that hard in a long time :-) I will no longer be annoyed when my kitties insist on rubbing their heads against the tripod legs all...
Great story...though it was even more interesting initially...early in the mornin' I read that as "my Australian _sheep_, Molly"... LOL Peace, Rod Mollise ...
I don't think that collimation can be used to cancel the effects of dispersion, at least not completely. That was my experience when trying to collimate on...
The only practical way to eliminate this differential refraction (other than letting Jupe get higher, which for some folks is a long-time prospect), is to use...
Agreed. There's no overlap between the effects of atmospheric dispersion and collimation. You'll never reduce dispersion by miscollimation! To get the best...
Although shifting the colors in post-processing does help, relative dispersion of an object at 25 degrees elevation can be quite significant across the...
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If I'm following this correctly I guess what's being said is that the benefit observed above (the premise of this topic) is mostly due to mechanical primary...
Hi Robert, That's good news. We were waiting for this one! Congratulations. I order one ( see my reply through Astromart ). Roger Laureys Hasselt Belgium ...
Mike, I'm not sure WHAT this is telling us. Primary mirror flop should NOT be THAT extensive. I've got an original N8 and do NOT have the issues described....
Collimation is a mechanical issue not a dispersion issue. And I wouldn't expect an 8" SCT to have this problem. That's a small lightweight mirror. The...
I only chimed in because you had referenced the post I made a while back regarding dispersion. I wanted to be clear that if collimation improves things, then...
Well - DUH! You'd have to be pretty dense to NOT know collimation is an opto-mechanical issue! Dispersion is another matter entirely. Seeing CAN be involved as...
Your second paragraph here is sort of where I was going with this...wondering how good the Jupiter moon collimation can be if there are dispersion effects...
Hi Roger, Thanks, I sent you a reply through astromart. Shipping to Belgium is $13, making the total $42.95. You can use either of these addresses for paypal: ...
Mike, The re-collimation on Jupiter's moon, bringing it into a nice tight round ball of light would seem to rule out disperson issues. Note the use of...
While I'll admit to mostly just looking at the pictures in that report my intepretation of what it was telling me was that an in- focus collimation on a...
Seeing was excellent this evening. Again, I had to deal with clouds that seem to enjoy teasing me by covering Jupiter every now and then. Note the bluish...
There was a time in the Deep South that even metioning his name could result in a tail whupping... Fred Charleston, AR ... him...who she referred to as "old...
Hi Christopher I will start saying that I admire your work with Jupiter, your images are outstanding to say the least. Second...Do you have a spare room? I...
Thanks David! I do have a spare room. 8) Actually, a lot of people have already visited me to see my seeing. In fact, one of the greatest planetary imagers,...
This happens with all SCTs. But it shouldn't move enough to be a problem (that is, even at the highest magnifications, the object shouldn't move out of the...
Hi Most SCTs focus by moving the primary mirror back and forth. It is mounted to what I call, a "slider" and it moves back and forth on the primary baffle. So...
Thanks Chris and Phil! It's not terrible, the movement is slight and as soon as I detect it i go the other way and go back to the direction I was going at it...
