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About rotatux

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    Star Forming

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  1. Only my 2nd attempt at Perseus Double Cluster with that tube. I had this in stock since last year but didn't put online. Now the more time passes the more I like it, and no good night since, so here it is. Gear: Olympus E-PL6 with Skywatcher 130PDS and SWCC at 600mm/4.62 and dydimium filter on Omegon EQ-300 tracking RA Capture: 22 lights × 20s × 2000 ISO, master bias, at 1.28"/px Site: deep country 26km from Limoges, France Processing: Regim 3.4, Fotoxx 12.01+
  2. The puff looks like not moving with the stars or clouds, maybe something has landed on your camera cover dome/pane
  3. Difference is far from obvious to me... Depth looks the same, as well as colors. But they are not the same scale so there may be much more details in the second one. Both good shots given the respective exposures, maybe too large a framing (reduce 25-30% ?), but be proud of them :)
  4. Only partly true: did you try a light pollution filter ? I think of the so-called moon & skyglow kind, aka didymium / neodymium; It is cheap, and filters out enough that color balance is a bit better; And you can mount a astro-2" one on a lens with an adapter. For mounting directly on-lens, search for a used or new redhancer / red enhancer model (same filter material, usually for capturing autumn colors). Just a detail about "histogram clearing the left edge" technique, it works but you need to account for the fact that on many cameras the histogram is an average of 3 channels, so you need to make enough space on the left that all 3 channels are (heuristically) cleared at the same time. Edit: and of course the most efficient against LP is Narrow Band imaging but you have to deal with much longer exposures (and hardware setup to achieve it).
  5. That's quite good (I largely prefer the second one). Is expectedly easier with 300s subs rather than 30s :)
  6. Yes I have seen this being reported too. But in my own experience I didn't encounter this problem. Or, I may have found ghosts around "Navi" (see here) but these were really intended Maybe there's one detail that keeps me away from ghosting: I usually mount my LP filter after the SWCC in the imaging train, i.e. between the CC and the camera. So that's glass which could also filter out reflections from the CC after all. YMMV.
  7. They are perfect for me (on my work monitor). I especially like that color balance of yours between red and blueish-white, and that stupendous amount of detail for a 2-pane mosaic
  8. Yes fantastic lens, not only for AP, it's also a killer for portraits I have "lab" tested that Samy and there's a bit of CA and coma wide open at f1.8 in sides and corners, but it's not a lot, rather like what remains after closing 1 or 2 stops most old manual lenses. It's just that for 1st light I didn't want to waste the shot and closed to F/2.8, which is enough to control it as you see.
  9. I have been suffering too long from bad weather, so I'm a bit rusty at AP. Any way this challenge is an excuse to post the only nice something I could get recently (taken on 2019-08-29). I like that region, it's rich with emission and reflection nebulas, open and globular clusters, and even a planetary nebula (though you can't guess it in the photo). It's also about the lowest I could shoot at the milky way this season, without getting too much light pollution. From middle left to upright through center: Kaus Borealis (star), M28 (glob), M8 (laguna), M20 (trifid), M21, M23 (open). Also some minor globulars SW of laguna can be guessed as fuzzy stars. Gear: Olympus E-PL6 with Christmas' Samyang 85mm/1.8 first light at f/2.8 and dydimium filter on Omegon EQ-300 tracking RA Capture: 16 lights × 60s × 1000 ISO, master bias Site: deep country 26km from Limoges, France Sky: average to good Processing: Regim 3.4, Fotoxx 12.01+
  10. "Best" would be highly subjective. But I can add a suggestion. Most of my dev work is done in a lightweight vi clone called vile (having used it for nearly 30 years). However I found in recent years that Python work is more easily done in IdleX, which is an extension of the Idle editor (which comes with stock Python). It has builtin shell, editor, both with completion, documentation viewer linked to them, and ability to execute fragments of files being edited. Its editor lacks the much-loved vi feel (for me), and is instead a rather neutral notepad-like more suited to anyone.
  11. CVAstroAlign. I even used it to align native-resolution frames (of my MFT sensor) of the moon, not just videos. However, I miss ROI selection and de-rotation from it. Thinking about writing my own tool for that tasks, or maybe patching it...
  12. Shame on me, I don't know what I've weighted... I re-checked this weekend and it's 3.3 kg without aperture cover. After seeing specs for the SW I had a doubt that the Celestron variant would be heavier, but that's eventually not the case.
  13. Not such a frequent subject. Pluging into the zoomed image to see the details in M106 is a delight.
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