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Showing results for tags '72ed'.
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Hi, Sorry for the silly questions but I am trying to find out what the correct back focus should be for a Sky-watcher 72ed, I have searched high and low on the internet for a manual thinking this would tell me. I have a few CCD's but these have been used for planets using a CPC925, I have got a skyris 618m, ASI224mc, Alatir GPcam and a Alatir GPCAM 2 mono for guiding. I would like to try my 72ED with a ASI224MC and try some DSO imaging, when I tried to focus with the ASI I could not achieve focus. 1) Do I need a 50mm 2" extension for a DSLR and a 80mm 2" extension tube for a CCD. 2) Do I need a field flattener and a smaller extension tube if the flattener is used? 3) What would be a good CCD for imaging with a 72ed refractor? Any help or advice would be great Many thanks Craig
Sky-watcher eco star 72ED with celestron x-cel eyepiece. Diagonal and ax-eq avant tripod for sale in Worthing. excellent condition. £290
£180 Selling a nice portable wide telescope with great glass and a great field of view I have two telescopes and I'm using the 80ED more currently and so this Telescope just isn't getting used anymore It has a longer dovetail (originally from the 80ED) so declination balance can be reached. Great performer for the price Collection only as P&P is like £40 (Northamptonshire - UK) Selling to fund a scope or mount upgrade. Selling
Hello all! The weekend that just passed we went to my girlfriend's parents. The skies in that rural area are pretty much as good as you can get. I don't have an SQM reader, but Clear Outside estimates 21.91. I didn't take the EQ6R with me, I still consider it a big lump of iron, and the AZ-EQ5 should be on its way back this week as a Stellar mount. So I used the EQ5 which was left in the car for a while. While the tracking/guiding on the RA axis is quite good, the DEC control jumps a lot after multiple consecutive guiding commands, I blame the "enhanced" handset. So with all the drawbacks, I tried to do align the mount as good as I could and I put the 72ED with the ASI1600 on it and a finder-guider. Perhaps also focus could have been done a bit better, FWHM in the subs was 3.x. Below is a quick process from last night, no deconvolution yet and a purple area at the bottom that I have to fix. 58x120s lum, 30x120s each RGB. Last version:
I went this weekend to my girlfriend's parents and I took my Skywatcher 72ED with me and the smaller AZ-EQ5. Fortunately, the skies are dark there. So, on 11/12 August I put all the stuff on the mount and took 130+ 60s subs with the Canon 550D. The result is a crop, towards the edges the stars are not perfect yet, but they're a bit better than in the past. I put some additional spacers to the universal flattener and increased the backfocus distance. The comet doesn't fill the frame anyway. Unfortunately, the animation doesn't really play ball, I will upload it somehow else later. Neither on the processed image I did the best job, I need to improve somehow in removing the artifacts on the comet-only image. However, this is what I got: