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carastro

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Everything posted by carastro

  1. Avani does it again, amazing Titan. Carole
  2. Thank you. I would imagine with the ASI cameras and the ability to take short exposures and the fast lens you probably could get away without guiding, I would certainly plan to do that myself if I take it on holiday and have to use a travel mount which won't guide. As regards focus, I have in the past found lens focussing quite difficult, so I bought myself about 18 months ago (with my old lenses) a finely cut Bahtinov mask (see below). This works very well, but always with a lens there is a tendency to nudge the focus especially if you have to put a dew heater on it. So I bought the Astrokraken microfocusser and mounting brackets which make focussing really ease to do and to lock. (Excuse the parcel tape = my Heath Robinson method of attaching the Square Bahtinov plate to a collar so it would fit over the lens, however to my delight I find it fits exactly inside the dew Hood and so I don't even had to take that off to focus. This is it mounted on my rig. HTH Carole
  3. Excellent result. This target is my Nemesis, and have yet to get a decent rendition of it. Carole
  4. Having said all that, I am pretty sure I have cone error, but have never been brave enough to make the adjustments, as I am sure I will just make it worse, so I tend to live with the cone error. GoTOs work fine one side of the Meridian, not so on the other side. Carole
  5. This should explain it: (approx 3.19 minutes into tutorial)
  6. Now that every-one has had a chance to examine the corner stars, I am cropping out the Nebula-less top and the processing artefact edge at the bottom.
  7. I do. Hubble palette Gina. The blue might be a bit Teal but if I tried to adjust it to a bluer colour the nebulosity seemed to fade. Carole
  8. My coloured version of the NAN and Pelican Nebulae:
  9. Started imaging at 1.30 am on two nights to get this by the time it rose above the house getting to bed after 4.30 am. Taken from Home in SE London Bortle 8. A lot of cloud spoiled the subs on the 2nd night when I got the colour.Samyang 135mm F2.8, & Atik 460EXHEQ5Ha 16 x 600Oiii 2 x 300 binned x 2 (clouds spoiled the other 6)Sii 6x 300 binned x 2RGB for stars 8 at 150 eachTotal imaging time 4 hours 20mins NB: Cropped version lower down. This is the full frame to show stars out to the corners.
  10. Am just about to post my coloured North america Nebula and Pelican taken over the last few nights. Had to start imaging this at 1.30 am as it was behind the house before that so had two nights staying up until 4.30am!!! Carole
  11. I did a quick process in Photoshop, there are a couple of slight darkened areas from the use of gradient exterminator which I would need to be more careful about if doing it more accurately, but this is what I managed to get: Carole PS: I have some tutorials on You Tube on Photoshop processing, there is a link to them on my website.
  12. Brilliant news, and just at the right time for those stuck at home in coronavirus quarantine/isolation, especially those like me who can't get to a dark location, and those who don't have a garden. Carole
  13. I've packed up, I could hear the wind rattling next door's fences, and I just kept worrying about my Clamshell dome being open, so decided it was better to close it and call it a night. Carole
  14. Currently imaging M42/HH with the Samyang lens. It's low and I only got 30mins on it last night before it went behind the trees. If I get another 30 mins it will be an hour in total. I tried to do Siemis 147 last night after M42 sunk, it's very faint and the Oiii was a complete waste of time, so will do a further batch with Ha and possibly RGB instead. Carole
  15. Sorry, Gina, way over my head.
  16. Thanks Old Eyes, yes Ha adds a lot to it. Not a lot to see on RGB alone. This is the RGB (but no luminance of course) and this is the Ha
  17. Image taken over 2 nights as it passes into the London Sky glow. Bit of a struggle to image and process from Bortle 8 and the London Pollution and sky glow, but no choice ATMIC405 and IC410 + IC417Atik460EX and Samyang 135mm F2.8Ha 17 x 600Ha 4 x 900Oiii 13 x 300 Binned x 2Sii 13 x 300 Binned x 2RGB 7 x 150 eachTotal 6h 32mins Taken over 2 eveningsCombined as RHa, GOiii, BSii Also on the Samyang 135mm thread
  18. One more image: Bit of a struggle to image and process from Bortle 8 and the London Pollution and sky glow, but no choice ATMIC405 and IC410 + IC417Atik460EX and Samyang 135mm F2.8Ha 17 x 600Ha 4 x 900Oiii 13 x 300 Binned x 2Sii 13 x 300 Binned x 2RGB 7 x 150 eachTotal 6h 32mins Taken over 2 eveningsCombined as RHa, GOiii, BSii
  19. Just taken 5 minutes off to do the UK clap for the NHS. Many neighbours out in their front gardens or hanging out of their windows clapping and cheering. Love that community spirit and the NHS and it's staff are doing a tremendous job against terrible odds. Carole
  20. Well I am out again, fourth time in the last few days, can;t remember so many clear nights in a row with no bright Moon. Carole
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