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About geoflewis

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    Star Forming
  • Birthday 01/11/54

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  1. Saturn (IR-RGB) 5 July 2017

    Thanks for looking. Nothing ventured, nothing gained...!! I'd definitely give it a try. Geof
  2. Globular clusters are so boring.... not!!

    Very nice images Sara and definitely not boring. I really like globs and locating M13 with my 7 year old naked eyes from the then even darker Norfolk skies is an abiding memory for me 55 years on. I still love to sit at the eyepiece of my C14 and drink in the view of that one as I let my eyes dark adaption build; its amazing how many stars start to resolve visually. A one time look at Omega Centauri from the Mount John observatory during a trip to New Zealand in 2013 really blew me away - I so wish we could see that one from the UK. What photos reveal that the eye cannot see, is the range of star colours that your images display so very well - simply gorgeous..!!
  3. 2017 astrophotographer of the year on BBC

    I did miss it, so thanks for posting it John. Geof
  4. QHY Polemaster HELP

    Paul, I agree your approach, but also agree with alacant that the route you should take once you are ready is to use PHD2 for guiding and use its excellent drift align tool for polar alignment. It is a remarkably straightforward procedure and extemely accurate. It will definitely get you to your goal of 5 minute subs with round stars, if not even longer sub exposures. Take your time and enjoy the ride... . Geof
  5. QHY Polemaster HELP

    Hi Paul, that is wise and sensible approach. Depending on the image scale of your camera + lens / scope and quality of the mount 5 minute subs might be an ambitious ask without guiding. I am not familar with the AVX and CGEM-DX mounts, but I think with even reasonable polar alignment maybe 2-3 minutes is a realistic expectation. You will get quite a lot of detail from a single 2 minute exposure and even more with stacking. Good luck. Geof
  6. QHY Polemaster HELP

    I have the Pole Master and it is good, but I don't think that it will work for you. In addition to using Polemaster for my initial alignment I also use PHD2 drift alignment method, which in my experience gives a more accurate alignment. It is the method that I used for a number of years when I used to have to set up and break down each night and in fact I only purchased the Polemaster to allow me to get a quick initial alignment of my rig when I installed it in an observatory. I have only used the PM once for the initial set up, but will periodically check polar alignment using PHD2 drift alignment, which only takes a few minutes, maybe 10-15 at most, really not much longer than using the PM and at no cost. Given your situation that is the method that I would use. Geof
  7. QHY Polemaster HELP

    The Polemaster solution works by providing an overlay of the region of the sky around Polaris against which you align the actual view as seen by the Polemaster camera. The field of view (FOV) of the polemaster camera is 11° x 8° (see bullet point 3 from the QHY on line description http://www.qhyccd.com/PoleMaster.html). I would therefore suggest that you will need to be able to see at least 6° of sky between your roof top and Polaris to be sure to get all the stars necessary in the camera view to align them with the provided overlay. I hope that this helps. Geof
  8. Whats not to like....? . It's a really nice image which stands up well to viewing at full resolution.
  9. Saturn (LRGB) 12 July 2017 - Good seeing

    Thnks Pete
  10. M51

    Paddy, you are right, it is gorgeous viewed at full size. Wonderfull image, well done. Geof
  11. Saturn (LRGB) 12 July 2017 - Good seeing

    Thanks Peter, yep I was pretty pleased with that one . Really steady seeing for about 30 minutes until the clouds ruined it Cheers, Geof
  12. It's all about perseverance really

    I agree, last night was very good seeing from Norfolk....
  13. Saturn (LRGB) 12 July 2017 - Good seeing

    Thanks Steve, a guess persistence pays off. There's a lot of AVIs on the cutting room floor here this past few months.... Cheers, Geof
  14. Saturn (LRGB) 12 July 2017 - Good seeing

    Thanks Simon, Last night the red was possibly even better than the IR and of course captured at a much faster frame. The seeing was so good that I decided to take a bit more time trying to get my capture histogram settings for each channel well tuned to each other, as that makes for a better final colour image. In the end I probably took too much time 'tuning', as the clouds unexpectedly caught me out. I've never known that happen before in the UK - yeah, right...!! I should have just grabbed as many AVIs as possible from the get go; it seems that I never learn that the UK weather hardly ever plays ball with astonomy.... Cheers, Geof