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About Celestron4

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  1. Thank you very much for the detailed reply! My DSLR is modified and does pick up a lot of the red is this helps. My skies are a bortle 4 (according to the clear outside app but shows as nearer to a 5 on the light pollution maps). Couldn't you use the filtered images as luminance data - isolate the red and green channels in photoshop and apply them to an unfiltered RGB image?
  2. I have a Celestron Nexstar Evolution Alt-Az mount which has sat unused and picking up dust for the last year or so. I moved to an AVX equatorial mount so have had little need for it. Would it be worth keeping to use as a tracking mount for a DSLR (Imaging the milky-way etc.)? Would the EQ Wedge be required to get long enough exposures? Or would I be better off selling it? If so what could I expect to get for it?
  3. In terms of focal length, ideally wide enough to get decent images of larger targets (M31, NGC1499, NGC7000) without having to worry about creating mosaics (I’ll have a go at some point but don’t have the time or enough clear nights at the moment). From what I’ve read refractors tend to be best for image quality but can get hugely expensive. What would be my best bet? A focuser is a good call, I might look into that but will depend on the telescope. I’m basically aiming to get my setup in a position that I can set it up leave it running (when I have clear nights) to maximise available ima
  4. Also worth adding, I’m looking at automating (in a loose sense) my setup a bit to allow me to leave it running overnight. The DSLR can be powered with an AC adaptor and I might move towards using a Raspberry pie to run the imaging setup. Is there anything that stands out as potentially helpful to achieving this?
  5. I have been thinking about a wider field telescope and wondering whether it might be a good idea. The mount does the job at the moment but could a shorter focal length scope help get more out of it? Would the Optolong L- Enhance be a good option in terms of a tri-band filter?
  6. As I am now coming to the point in the year that University finished for the summer and I can finally turn my attention back to astrophotography, I figured that it might be a good time to spend some money on new equipment. My current equipment: Celestron Nexstar Evolution 6 SCT (with celestron f6.3 reducer) Celestron AVX mount Altair 60mm guidescope and GP-CAM 130C guide camera Canon DLSR (modified EOS 600D) What would be best to spend some money on? My budget is limited (ideally around the £500 mark, I know this isn't very much) and I would ideally like to keep
  7. Thanks very much for the advice! The filter would mainly be to deal with the moon rather than light pollution. Could you not also produced HaRGB images by separating out the Ha from the OIII?
  8. I am looking at filters to be able to improve detail and contrast in my images and have my eye on the Optolong L-eXtreme/L-eNhance. I am using a Canon EOS600D DSLR attached to my telescope. I have Bortle 4 skies if it is any help. Which would be the best to go for?
  9. I am currently having issues with my Celestron Nexstar 6 SCT. My collimation is a bit offend has led to odd shaped stars in my images of M42. I have tried to rectify the issue but am still not convinced its quite right. Should the shadow of the mirror (dark circle) move as you move the across the field of view or has something gone horribly wrong with my optics I am also looking at getting a wider field telescope to allow me to image objects like IC1805 (Heart Nebula) without having to worry about musics for the time being. My budget isn't huge (ideally below £500). Are the Skywatcher Evo
  10. I would power the DSLR with an AC power adapter rather than using the battery. Some will charge off USB so shouldn’t be an issue. My current scope is. 6” SCT so shouldn’t be an issue with meridian flip. How do you deal with dark frames? Is it still a manual process?
  11. Good point. I hadn’t considered the meridian flip. Does Astrophotography Tool not have a feature designed to automate the flip?
  12. I am considering making some changes to my imaging setup to allow me to leave it running overnight to maximise my imaging time and need some advice. My setup is currently: Celestron Nexstar 6 SCT (with f.6.3 reducer), Celestron AVX Mount, Canon EOS 600D (Astro modified), Altair 60mm guide scope (guide camera is Altair GPCAM 130C) all controlled with a very old laptop (on camera connection - I have tried ASCOM but have had some issues). I know that it is possible to remotely control/monitor the setup (I wouldn’t need much more than a 5m range) and am therefore considering replacing the lap
  13. I have the Celestron SCT T-Adapter so the spacing shouldn’t be an issue. I’ll have a look at the collimation, I haven’t done it in a while so may be the issue.
  14. I have had a go at imaging M42 Orion Nebula and the result is one of my best attempts so far. However, the images seem to show some tracking/guiding issues. I have now had the same issues for a second night running and am struggling to identify the cause. I am using a Celestron Nexstar Evolution 6 SCT (with Celestron f6.3 focal reducer on a Celestron AVX mount, a 60mm guidescope and a modified Canon EOS600D. Could the issues be a limitation with the scope itself (field curvature etc) or is it likely just a guiding issue?
  15. Thanks very much for the advice. I did use flats, clearly not very good ones though.
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