Hi I'm new to the group so please bear with me. I've been taking pics with my Sony A350 on a static tripod , so quite limited with regards to the number of...
Hi John I'm not an expert (only started out a couple of months back) but as I understand it, if you increase the number of exposures it can help reduce the...
Hi John & John (and others ;-) ) First of all, welcome to the group ! The time limit for each independant exposure depends of 1) sky light pollution which...
John Look at the histogram at the back of the camera. It will look like a “mountain” with a fairly sharp peak. The left slope of that peak shall be well...
Guy This is a good M45! One minor observation - the stars are slightly elongated. So for the next time I would suggest 120s (depending on where your histogram...
Congratulations Guy. That's a very impressive NAN area shot. Of equal interest to me is that you seem to have used the same lens as I bought last week - namely...
I meant to post this question a while ago but was wondering what the longest focal length/duration of exposure members here have tried using their AstroTrac...
Hi, Andy: I am still awaiting the delivery of a 90mm flourite apo scope so that I can do a true drift alignment on my astrotrac prior to taking photos. My...
Andy 20min at 800mm is mighty impressive. It would be interesting too look at a full size image (or crop thereof) to judge star trailing more accurately. BR ...
Hy Andy This sounds impressive! Can you please post a 100% crop from the center part of the 20min picture? It is hard to tell from the overview Picture. I did...
Hello Yuriy Welcome to the club. With your CCD, you show us the real power. Very nice Shots. The second postprocessing is well worth the extra time... A CCD is...
Matts/Rainer I appreciate the feedback. The two shots are both full frame and unprocessed (bar reducing the file size for uploading to forums), hence the amp...
Andy, Interesting trial exposures. I shoot with a 200mm telephoto on the Astrotrac and limit my exposures to 4 minutes because I find that is the maximum I can...
... According to Richard, the specs on the AstroTrac are say periodic error is 5" in 5 minutes. With my Canon 350D and Borg 45ED, I'm at 5"/pixel. So I found...
... Okay, English is my first language even if you can't tell from that first sentence :-/ What I meant to write was... According to Richard, the specs on the...
Roland, I'm not sure what the periodic error is on my AT but with the the 200mm telephoto I'm at around 7" per pixel so the drive is not the primary concern...
... Peter, just been looking at your site and there are some very impressive images on there. Thanks for the link. I also tend to do exposures from around 3~5...
1) If you put a camra on a tripod (no astrotrac) and point it at polaris, and take a 30 minute exposure, the earth rotates in the field of view around polaris....
Hey to all, Like many of you, my sub exposures run 1-4 minutes, generally, using a DSLR/lens/or scope on the AT. However, I use the histogram on the camera to...
Have lots of time on my hands so thought I'd do a nicer job on my camera power supply..I know it's a bit over kill but for those interested in doing their own...
http://ChasR.zenfolio.com My other web page was giving me problems so I switched over to Zenfolio,,it works much better,,have to get to learn it better. Chas...
Made up a combo supply for a friend to do some testing,,for those do it yourselfers,,the same PC board was used in the photos http://chasr.zenfolio.com ,, just...
Some simple rules for the AstroTrac Yahoo Group: 1) All equipment problems and warranty issues must be directed to support@... where they will be...
astrotrac@yahoogroups...
Nov 1, 2009 12:56 pm
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I have a Stellarvue SV80ST APO refractor with a Stellarvue M1 Alt/Az mount head that I am considering using with the Astrotrac TT320X and its TW3100 wedge. I...
Hi, Carl: I just saw your note and wanted to give you a kindred spirit reply. Unfortunately, my Stellarvue 90 is still being mailed, but I hope to get it...
There are several possibilities for mounting imaging setups on the AT. 1. Ball heads (I like the M490RC4 Maxi better than the M410 geared) 2. Geared heads ...
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