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GreatAttractor

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About GreatAttractor

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    Poland
  1. Yep, you'll need a head cloth to get rid of reflections. BTW, to me the introduction of glossy screens always looked like a fad ("improved clarity and vibrance" and all that). Fortunately, laptop vendors still have matte-screen models and that's always my key requirement when buying a new one.
  2. Oh, come on, most of us here have :> There's plenty on Astrobin (see e.g. http://www.astrobin.com/users/GreatAttractor/collections/131/) and elsewhere. It's just that once you transition to Hα, it's hard to go back. As for your overexposure issues, it could be due to the ND filter being too bright; at the same time, an f/6 refractor gives a very bright image at prime focus. Possible solutions: - use the Baader ND5 film over the objective lens instead of the wedge (very cheap, practically the same image quality) - add a Barlow - add another 1,25" ND filter (like 25% or even darker; they're cheap too) - add a green filter ("visual" or the Baader Solar Continuum); not only reduces brightness, but improves granulation contrast Combinations of the above will also work. Not recommended, as image resolution is proportional to aperture. The only reason for using a mask would be bad seeing (too bad for full 123 mm), and for white light I'd suggest keeping it at at least 80 mm.
  3. Milky haze or not, that's some beautiful activity there!
  4. That's right, Mesa.
  5. Thanks, guys. Ultimately, I'd love to be able to do this with my 300 mm Newt, but I guess it'll have to wait until autumn.
  6. Last Friday I finally got around to doing a Moon time-lapse. I wasn't sure what good the small Mak would be, but changes are indeed visible: SW Mak 127, PGR Chameleon 3 mono (ICX445) with Barlow in the nosepiece (~1.6x), Baader red 610 nm filter, around 2-minute intervals, ~4 h total from 7:15 PM local time. The sky was of course quite bright in the beginning, so frames' brightness has been normalized in ImPPG. Too bad the seeing was steadily deteriorating.
  7. It's only for solar/lunar/planetary videos, not deep sky as DSS.
  8. Thanks, everyone.
  9. New version 0.3.0 can be downloaded from https://github.com/GreatAttractor/stackistry/releases New features: Better AVI support via libav Bug fixes: Fixed crashes during triangulation
  10. I've had a fruitful weekend: good seeing (for 90 mm aperture, that is), crystal clear skies on Friday, and equally good seeing on Saturday with 1/3 cloud cover miraculously sweeping sideways from my location since morning to 4 pm. Too bad I caught only one stronger C-class flare in AR 2661 in all those hours. Everything captured with a 90 mm refractor with Lunt 50 etalon, PGR Chameleon 3 mono (ICX445), processed with Stackistry and ImPPG, showing AR 2661. Overview shot of AR 2661 on Friday morning: Friday, 30-s intervals, 0:53 h and 1:06 h. Lots of small-scale activity, too bad it wasn't exactly on the limb as on Thursday; the spikes and surges would look even better (as in http://astrob.in/262196/B/): Saturday, 30-s intervals, 2:15 h total. A class C2.1 flare peaked at 9:57 UTC (preceded by a few smaller events around): The flare maximum: And the whole material from Saturday on fast forward (5-minute intervals, 4:45 h total), showing the changing aspect as the Sun rotates:
  11. Thank you, everyone.
  12. I had a wonderful cloudless Sunday with good seeing for most of the day (and superb transparency). Too bad all I got was a few weak flares in Active Region 2659... 90 mm refractor + Lunt 50 etalon, 30-second intervals, 2:15 h total: Single-shot full disk, made with Lunt 50 OTA (no Barlow): All captured with PGR Chameleon 3 mono (ICX445), processed with Stackistry and ImPPG.
  13. I agree with Michael. Over-sharpening in case of this image is also demonstrated by the "turned edge" - the white ring along the limb. I remember it well from my too-eager WL processing efforts from a few years back In general, I discourage using the "automatically sharpened" output files. You should consider each image (or image set) separately and fine-tune sharpening parameters, be it wavelets or deconvolution.
  14. Thank you, everyone.
  15. Not much was happening on the Sun on Friday, but a few hours of good seeing cannot go unused. 30-second intervals, 2:49 h total (with breaks); note the penumbral waves around the small sunspot and the curiously converging mottles in bottom-left corner: Plasma rain caught in crosswind (30-second intervals, 2:18 h with breaks): Everything shot with a 90 mm refractor + Lunt 50 etalon, PGR Chameleon 3 mono (ICX445), processed with Stackistry and ImPPG.