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Found 2 results

  1. Last time was the first usable, fairly clear night since my return from my business trip. I had the telescope out imaging 2x planetary DSO (M57 & NGC7662) and left everything running into the night waiting for Jupiter to clear my next door neighbours house. Everything was ready, the DMK21, IR_filter and my new, well second hand Celestron 2x Ultima barlow. I was a little worried about this test, since in the past I have been using my ExtQ 1.6x with the Mewlon which is of course a very high quality piece of kit from Takahashi. So what could I expect from a Celestron Ultima 2x barlow??? I'm very very impressed by the results so far, see for yourself! The image scale has benefited greatly, the brightness has decreased and I'm now at my camera's maximum sensitivity. Also, I have increased the frame capture to 5000 from 2000 previously. Transparency was average to poor but the seeing was excellent all night. I managed to get 3x runs in before the image faded away as the clouds rolled in. I'm very happy with the result and see it as another step forward in my planetary imaging. Right now I probably don't have the optimum setting that will change with more time and experience with this setup. I more sensitive camera maybe needed, perhaps for Christmas!!! I still can't quite believe the quality of this rather small compact barlow package, its excellent and I must thank "Neil Phillips" for the recommendation. My WO Barlow was sold long ago and despite its size 2" and 3xED optic element claims couldn't compete with this package from Celestron. I have never used a Televue barlow or powermate but if I were them I'd be buying these Celestron Ultima up and crushing them, since from a Price v Performance point of view I cannot see a Televue barlow / powermate being that much better, its just not possible!!!
  2. A big thank you to everyone who commented on my Onion ringing problem because its now solved , great! I think the decisive fact was the Gamma needed to be at 100 or greater. At approximately 02:30 I managed to get this set of Jupiter images using the modified Mewlon M250S (CR Baffle added) and the DMK21 with the correct settings!!! They are only mono, taken using and IR-Pass filter; one day I will invest in a manual filter wheel and the necessary RGB filters but for now I'm very happy with the results. Still need some advise; As anyone used Metaguide? I'm trying to use this for collimation of the scope? I have read the manual and I think collimation is bang-on but want to push to get that last bit of perfection!!! Problem was that the "red dot" was moving around too much. Very close to the centre of the star and not too far away but perhaps I could have got a better result with a better technique??? Anyway, I hope that you like the images Most probably seeing conditions were the limiting factor
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