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AbsolutelyN

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Everything posted by AbsolutelyN

  1. Thanks Adrian. Typically somehow managed to get a big diffraction spike from an out of frame star running right through M106. Had to carefully clone it out.
  2. Making the most of this clear spell .... this time M106. I was particularly drawn to the varying scales of all the galaxies, from big to barely visible. 5.5 hours with 250-PDS and 1600MM. Gradient issues solved, assume it was light leaking in the back of primary, possibly when taking flats during the day. Full res on astrobin - https://www.astrobin.com/8p4x95/
  3. Looks great, best of both. Definitely an improvement to me.
  4. That's way out of my budget, I'm thinking more reasonably priced CEM70 or similar.
  5. That's insane. I managed 0.8" the other night with AZEQ6 but the 10" is too heavy and even dithering can make it lose it somewhat. I thought I'd invested in a mount that would handle anything I needed when I bought it 5 years ago but I think I need to consider something a bit more robust soon.
  6. Wow. You must have some seriously good guiding at that focal length for 15min exposures! I can only manage 1 min at less than half the focal length
  7. Yes I know ... had an accident with mine and I'm missing it a lot.
  8. I really like the smooth background of version B on astrobin which has nice softer background. Personally I'd try layering them up and allow the smooth dark background of B to blend into your final image? What focal length are you working at?
  9. Stunning Göran, you pick up the most subtle colours in the IFN.
  10. Another difficult to process galaxy. For some reason the luminance channel had the most bizarre gradients which took a lot of work to remove with DBE in PixInsight. Hopefully they have been mostly removed a the background is not too bad. 5.6 hours with 250-PDS and ZWO 1600MM https://www.astrobin.com/48w0xe/
  11. It will only work on Canon AF lenses - they have a list of lenses its been tested with here: https://astromechanics.org/downloads/ascom_ef/en/manual/lens_test.pdf
  12. Yes it controls focus and aperture. Focus control seems as good as my sesto senso to me, very fine adjustments possible. You can only set aperture when you connect in SGP so you've have to disconnect and change a setting and reconnect if you wanted to change aperture. The main issue was power but I don't think you'd have this problem as you have an observatory. I'm running it at the end of a 20m USB cable and there is no power left in the USB cable to power the adapter which draws power from USB. I've fixed it by installing a powered USB hub. Another issue was it being inconsistent at connecting. Again this could be because of my setup as it always works fine from a short cable direct into laptop. Finally if you add too many spacers it seems to hit a hard infinity despite still being able to manually get the image in focus. Overall brilliant bit of kit though and much more compact than a belt driven solution - https://www.firstlightoptics.com/adapters/astromechanics-ascom-aps-c-m42-to-canon-lens-controller-mark-ii.html
  13. At 400mm I needed 15 hours (from bortle 5) to get good detail in the IFN and that's at f/2 so I find fast lenses and scopes are the only real way to access it with UK weather.
  14. It looks very good to me and the colours are spot on. Have you cropped this? I assumed the 2600 would have a wider field of view. Will have to try the 2600MC on the 250PDS. I'm still processing my M63 as some really strange gradient driving me crazy which is only on the L channel.
  15. Thanks, it was difficult to both capture and process, it has very bright areas and also very faint areas making it a tough target despite its size.
  16. This is a corner from full frame 6d
  17. I was a little disappointed at first as unrealistically expected perfection given only using aps-c and not full frame but having worked on the spacing to get it like this I'm finding it perfectly ok and very usable.
  18. This is about as good as I've managed so far. Bit better stacked as you say.
  19. F/1.4 as I can barely tell the difference between f/1.4 and f/2 ... and seems pointless to got to f/2.8 as you could get a cheaper lens
  20. It's a fantastic lens, though from reviews I hoped for better coma
  21. I'm using the Astromechanics EOS adapter. I've had issues connecting and controlling to the thing but when you get it working it's superb. This image for example was refocussed once every 2 hours automatically in SGP. It's just like using any scope autofocusser in SGP and you can even set the aperture when you connect to it. Without the adaptor you can change aperture on a Sigma lens by attaching it to a canon body, setting aperture, press depth of field preview and remove the lens whilst its pressed.
  22. Thanks Alan. I really like narrower field of view here but they need much more exposure so harder to do. I also find it's not very easy to plate solve and guide in this area. The area is utterly fascinating though, just the starless version shows some quite amazing structures to explore.
  23. Stars are sharp but I think you just need much more data/exposure time. Make sure you dither between every 2nd or 3rd exposure to help reduce noise. Then add appropriate bias, darks and flats if you can. If you've had success without the LPro then remove it - its just an extra piece of glass that will further limit light getting to your sensor. Good luck. ps. I'd also double check you are getting the exposure time you think you are as it doesn't look like 30 mins of data from a 250mm newtonian. With my DSLR I regularly think I'm taking 1min exposures only to find they are 1 second - easily done in the dark (by me anyway).
  24. This is second attempt at Polaris with Sigma 105 1.4 and 2600mc on a star adventurer. This time I went with 2min exposures and managed a longer integration time, almost 7 hours. Setup in action here -
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