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dan_19991

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About dan_19991

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    Nebula
  1. see thats what i thought but i was outside at the time and it was perfectly clear, it was only the one frame aswell and then it would go back to fine, it may have been it hadnt had time to acclimatize to the temperature outside but my dslr never does anything like it, i shall have another go tomorrow if the sky permits and report back.
  2. just thought id update this thread, after having a clear night, i found that in any given position even with the F/12 scope, i would get at least 4 stars that were suitable for guiding, i did however have a little trouble getting it properly focused at first, and also i think it is the camera, occasionally the the noise of the camera would flash up so id get one exposure that was incredibly noisy and PHD would loose the guide star, this did slow and eventually stop towards the end of night but other than the camera being faulty i cant figure an explanation for this. I i will definitely be looking at getting an st80 or similar to replace the scope but for now its certainly usable, i also found that now my guiding was pretty decent and the stars are looking relatively round, i need a coma corrector as it is now very evident. this is the image i got of M1 the crab nebula at 20 x 500 second subs.
  3. i dont currently have a set but im sure i could, but im concerned that the small field of view of the f/12 wont be able to consistently give me a guide star. ill be sure to post pictures when i can.
  4. Thanks for the reply. Thats a good point which i previously hadnt considered, the weight isnt much of a problem as im stil a fair few kgs under recommended for the NEQ6, and the size, your correct i believe when focused it is geting just longer than my main scope. but the main problem im considering now is flexture especially considering the guiderings are homemade, im currently looking into any ways of reducing flexure. I am a bit confused why you think the stars may be blurry however? and if there would be anything i could do to rectify this (i obviously cant say if your right or wrong for a few days).
  5. So from what ive heard the only reason to have a short focal length guidescope is for the extra field of view, in theory the f/12 should work fine just take longer to find a guidestar, at least until i am able to buy an st80 or alternate. thanks all for the help, and once the new guide camera arrives ill be sure to post some pictures.
  6. thanks for the advise, and i certainly will post how i get on when i get the camera and some clear nights, assuming it all works of course.
  7. thanks, that makes sense, and im afraid i have little to no backfoucus, im going to barely get a coma corrector in there
  8. thanks for the reply, my hope is to upgrade to a st80 or similar in summer but ive just forked out for a NEQ6 and guide camera, so money is a tad tight a the moment, i guess ill try the 70mm f/12 and see how it goes, i just dont understand for f ratios work and what an optimal guide scope would be.
  9. Hi there, Ive recently bought my first proper guide camera (altair GPCAMv2 130 mono) meaning i now have a NEQ6 mount, carrying a 8" SW200p reflecting telescope, a guide camera, and a dslr for the main imaging, but a bit confused about a guidescope, my scope came with a 9x50 straight through finder scope which i could use or i have a 70mm f/12 telescope, which was my first scope. The thing im confused about is how F ratio of a guidescope affects its guiding capability? would the larger apparture of the 70mm be usable as i have already got guidescope rings for it or is it a better idea to buy an adapter for the camera? Thanks
  10. thanks for the offer, but my scope did come with a straight through finder.
  11. thanks to everyone for the replies, i think ive decided to keep an eye out on astobuysell and alternatives, but if nothing comes up i think itll be a QHY5 ii.
  12. so the qhy5ii would be better than the DMK? so it it soley the chip size that matters, and how does the QE come into it?
  13. so ive had a look and from what ive found the qhy5 ii mono has a chip size of 6.66 mm (H) x 5.32 mm (V) and a pixel size of 5.2 m x 5.2 m, the QE graph however peaks at around the 55% mark where as the DMK 21AU618.AS. hasa chip size of of 4.46mm x 3.8mm and a pixel size of 5.6 x 5.6 and the QE peaks at around the 65% mark so for the DMK the QE peaks higher and has a larger pixel size but has a much smaller chip size, my question is which of these factors is most relevent to autoguiding?
  14. oh okay thanks for thanks, i do plan on pulse guiding but have been looking at the DMK 21AU618.AS. as there is one for sale for around £100 and they retail for triple that, but cant seem to find anyone using it as a guide camera.
  15. Thanks, yeah that’s what I’m hoping for, so would it matter if it’s classified as a planetary camera or is that just a name
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