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badgers last won the day on September 19 2012

badgers had the most liked content!

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About badgers

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    Cambridge, UK

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  1. Self denial leads to wisdom, but its a pain.

  2. I'm sorry I've been away from the forums for an age with work and other things. Sadly the new LED lights on my street and the appalling weather dampened my enthusiasm for DSO imaging, although I plan to dust off the ATIK, 80/480 and the Canon 200mm lens and get some work in this winter. I wanted to setup a planetary imaging rig to give me something to do on nights where I don't want to fight with guiding and alignment etc. I've a HEQ5 mount already and have been offered a Celestron C9.25 at a decent price. Will the HEQ5 mount deal with the C9.25 ok for lunar and planetary imaging ? What kind o
  3. Yep, the Gnome Camp : ) Security told me there were some astronomers about, although I've not yet done an imaging session on the campus. I've a good spot at the back of Duxford I've used and one near six mile bottom. PM me for details, would be good to meet up with another imager in the area. Anton
  4. Welcome tdmodels, I work just down the road from you in Hinxton but spend the rest of my time in the orange light-fest of Cambridge.
  5. No worries Ewan. The OAG did work wonders for me. My home-made guidescope rings and finder-guider seemed to cause quite a bit of differential flexure that crept in above 10-15minute exposures.
  6. Bias frames have completely eliminated this issue for me. Thank you everyone, I feel embarrassed for my 'hissy fit' I don't have a massive budget and my CCD was by far the biggest expense so I was a little alarmed. I finally got around to reshooting 200 bias frames and this has cleared up the problem nicely. It was about time I reshot bias and dark frames anyway. Thanks again for the support, Anton
  7. Hi Ewan, I'm working with the previous version of the Flattener on the same scope and the old planostar required 51.5mm backfocus which was even less space to play with. I use a Quantum Filter 7x electric filter wheel (21mm) and the TS OAG 9mm + Atik Backfocus (13mm). If memory serves I come in at about 52mm when everything is connected up due to mms lost at thread interconnects. I have the Planostar connecting directly into the TS OAG and there is very little wasted space with that setup with the connections. You shouldn't have any problem at all getting the spacing right, but it may take yo
  8. Hi Sara, The imaging train is: Lens -> Eos side: Filter Drawer :T2 side -> T2 Spacer (5mm) -> Atik 460. If I can get this running a bit faster, I can make a lot of use of the few nights that aren't cloudy here. Thanks, Anton
  9. Thanks, Yes, I think I'll want to look at tilt using CCD inspector on a nice flat star-field and adjust the Gerd Neumann adapter to be more solid. That and focusing on different reference points around the image. The aperture mask I'm using is a piece of black PVC that's been perfectly cut to size by Monsieur Penrice the original owner of the lens. It may be that I should try and construct some incrementally smaller masks as you suggest Peter. Anton
  10. Yes, it's a shame there's no way to hack into the autofocus motors in this kind of CCD setup. The metal focusing adapter though is good, I can make adjustments that change my FHWM by 0.2 or 0.3 so I think I'm doing a reasonable job nailing the focus. I'm thinking its a combination of focus and that the imaging train might not be square. So the star I'm focusing on in the 1/3 intersection is blowing out the focus everywhere else as the optical centre isn't where I think it is. The gerd neumann adapter is nice, but it doesn't lock down the lens as well as I'd like, also the filter trays are very
  11. My own tests (see new post) at f/2.8 aren't anywhere near as nice as jnc's, coma everywhere!, although f/4 looks great. You've got a great setup there jnc!
  12. Hello Everyone, I've finally got my widefield imaging setup working, many thanks to jnc71106 and his thread for help. I finally got some proper test images running with the lens wide-open at f/2.8 and aperture masked to about f/4. I've been adopting the wisdom from psychobilly to focus on a star at a point near the 1/3 intersections on the sensor. I did a series of tests last night on the pelican and north america nebula for 10 minute shots through a H-alpha filter. click to enlarge to full size I have seen some people getting fairly acceptable stars at f/2.8. However, I'm not sure the perf
  13. Thanks for that Steve, my defect looks almost identical to the one in Figure 2 of the SBIG PDF, so hopefully will vanish away with bias and darks. I was more worried about some electronic or power issue, the more reading I do now the more I see how common these are. I feel like a bit of a wally now for over-reacting..... But I love that Atik : )
  14. Well looks like I've just developed my first column defect on the Atik, praying that bias frames remove the little swine..... I may hold off ordering though until I've sussed out the issue with the Atik. But yes, I think it's a good upgrade from the HEQ5 Pro, I'm taking Stephens warning under consideration, but I should be able to manage the extra weight, hopefully that gym time will pay off : ) Thanks again, Anton
  15. That's good to hear! I took a punt on them for the Atik due to currency fluctuations.... The following week FLO had them on special offer about £200 cheaper : ) I'll drop them a line in the morning, but it's hopefully fixed with the bias frames assuming the defect is consistent.
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