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About SamAndrew

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    Star Forming

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    SW London
  1. Created a simple power pack using a 110AH leisure battery, 4 cigarette lighters and a couple of switches all mounted in a Stanley FatMax Tote bag. Battery is only 4 months old but a change of plans means I no longer need it. £30 for the battery or £50 for the whole setup. Collection only - Kingston SW London. Thanks Sam
  2. Great result for a first image
  3. I would try the Esprit and Altair first, get the setup working, then think about changing the 2nd scope if you aren't happy with the results.
  4. Thanks - I was happy with the Quattro, but I ended up moving into London so sold most of my gear. I have since moved again and now have outside space, but wanted something more portable this time. Can get setup in 15 minutes with the Star71 as I can leave everything connected to the scope.
  5. Lovely result, I think you've got the full resolution available there, the detail is very sharp.
  6. Thanks, I think the key so far has been to get a lot of luminance data, would love a longer focal length scope; need to keep saving.
  7. Great news, look forward to seeing some results from the RASA now
  8. Captured these last week, still quite amazed how well these LRGB images are coming out for a Bortle 8 sky. Not ideal shooting with such a short focal length at this time of year; currently fighting the urge to get another newtonian, but the costs soon add up once you've added a coma corrector and motor focuser, and really I have my heart set on a big refractor. My processing is improving, this one took two attempts as I didn't mask the stars the first time when doing High Dynamic Range Wavelet Transform which exaggerates the diffraction patterns caused by the ASI 1600 camera resulting in cross shaped stars. I wonder if the collimation could do with adjusting, looking at the stars in the corners, but maybe this is just the limit of the scope. Blue channel background is a bit uneven, attempted several background corrections but think this is just the result of light pollution and maybe more data would help. Included the annotated image as the wide field of view has picked up a lot of small fuzzies. Capture details L 4 hours 35mins R 50 mins G 1 hour B 1h 10m 5 minutes subs at gain 0 William Optics Star 71, AZEQ5, ZWO 1600mm Thanks for looking, feedback welcome Sam
  9. I would play with this tool to help you decide: https://astronomy.tools/calculators/field_of_view/ No reason not to consider CMOS offerings from ZWO (other than they're about to release a load of new cameras in the next few months)
  10. Go on then, haven't captured this one myself, totally distracted me from what I was going to do Good to test my skills, have ended up with a bit of colour mottle going on in the background. Not too happy with the stars either, managed to introduce some dark ringing.
  11. I've been using PI for 4 months and find I'm using Photoshop less and less to the point that I don't use it at all for some images; the only things I go to PS for would be spot healing or blending different layers.
  12. I'm still pretty new to LRGB imaging, but the process I've been using in PI involves extracting the luminance from the RGB image and apply that as a mask, and then applying a very strong saturation boost using the curves tool. Remove the mask and then apply the actual luminance data. Has resulted in some fantastic colour.
  13. Oooo that's an exciting development, fingers crossed it's a bit cheaper than their previous full frame cameras. I wonder if these high resolution cameras will eventually be the death of long focal length imaging scopes.
  14. Used the steel Quattro scopes and found the focus very stable, I would happily get another steel one.
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