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AnakChan

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About AnakChan

  • Rank
    Star Forming

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  • Location
    Tokyo
  1. The reason why I do my flats (and actually my bias & darks too) at home is that my friends & I normally have to get out quick before sunrise & before the golfers start rocking up ;). We do our astronomy work in the golf course car park about 100km from home. The golf course (conveniently named Cosmo Classic Golf Club!?) has electric fencing around their fairways to prevent wild boars from coming). Everytime we go, it’s exciting :). If it’s not wild boars, it’ll be owls or flying foxes scaring us.
  2. Thanks for the complements folks. I'm still learning heaps about digital AP and I'm very much a rookie trial 'n error-ing. Yeah there's something weird about my flats. Actually my flats weren't taken in the same session as the light session. I take my light sub out in the field and I took the flats like 9 hrs later after coming back home so camera orientation was probably off, etc. I'd probably need to spin off a separate thread once I've worked out how to formulate my questions in a structured way. I have so many questions :D.
  3. It seem M63 is a popular galaxy for April! Here's what I managed to capture on 21-22nd April. Details are as follows :- Takahashi µ250CRS (@ 2500mm F/10) CentralDS Astro A7S cooled to about -5C (ambient was 14C) 93 light subs of 2 mins each @ ISO2000 113 Bias (built use SuperBias) 97 Darks 100 Flats Processed via PixInsight 1.8.5 and Photoshop CC The first time I processed with ABE, I had lots of background noise. I re-processed without ABE and it seemed to have looked better.
  4. At least the main white LED light at 460nm is being cut out. Something of which the former LPS-D1 and LPS-P2 did not :- Anyhow, if I get some clear skies, will do a comparison with the my former LPS-D1 and the new LPS-D2, and against the LPS-V4 too.
  5. If their graphs are to be believed, this is what they've put on their page :-
  6. Just FYI, IDAS has just released a new light pollution suppressor, LPS-D2. This suppresses LED wavelengths along with high pressure sodium. I've just picked this up 3-4 hrs ago and have not had a chance to try it out yet :- v
  7. So since Oct '14, my gear has changed quite a bit. I did use the SXP with the Mewlon 250CRS for about a year and it required a perfect balance/ideal zero wind conditions for it to work - as you've put it, no tolerance. In late Nov '15 I moved up to the Vixen AXD and that provided all the tolerance I needed especially from the environment. The AXD is a much heftier mount though and is a challenge to lug around every time I go out to do a nights' worth of astrophotography.
  8. Gotcha. Anyhow if you decide to look back into the T-Factory product again, there's been a few changes/options available now that makes it a little more versatile to take drink bottles as counterweights which makes it great for travel. However I think I could do with a shorter counterweight shaft and an additional counterweight as the longer counterweight shaft is more susceptible to vibrations.
  9. Portable Astrophotography setup
  10. Mikey, Sorry for the late response...too late for your canaries trip. Did you try reaching out to T-Factory directly to see if you could pick up their updated PCB-EQ3?
  11. Thanks you Paddy. Yes I went for 30 mins for depth and I think it was about the limits of the CDS Astro A7s as it was starting to get noisy despite cooling was 18C below ambient. It's also only a 12MP FF at 8.4micron/pixel. At my location (100km away from Tokyo) with the LPS-V4, 30 mins was fine, but with the HEUIB II it was almost washed out with sky fog. Next time I get out I'll play around with different settings and may try with my D810A too. Cheers for the tips again!
  12. Thank you for the kind words. I'm still cracking my head to see how I can pull up more OIII with just a (modded) colour DSLR. I'll continue playing around with the colour balance & reduce the magenta. How does one reduce the number of stars captured though (whilst trying to have long enough subs to capture the faint structures in the nebulosity?). My shot above is bombarded with the faint stars.
  13. After seeing swag72's very impressive photo of the NGC6888 Crescent nebula, I'm somewhat embarrassed to put mine up! But I've not posted here in ages so here it goes. Tak µ-250CRS CDS Astro A7s 4x30 min subs (1x LPS-D1, 1x, HEUIB II, 2x LPS-V4) = Total 2 hrs ISO2500 Ambient temp approx 22-24˚C and the CDS Astro A7s cooled the sensor down to about 2.6-3.1˚C Humidity ranged from 87%-95% Processed by DSS & PS CC.
  14. Sadly, I've yet to take my scope out for a test and I bought it 5 months ago! About the robofocus, this isn't the 125SDP but the Vixen VSD100 instead. However since the design is similar, just that the 125SDP is larger, I wonder if the maker (K-Astec) would be keen to entertain the 125SDP too :-
  15. I actually struggle trying to get beyond 200mm with my Polarie for more than 2 min exposures. But I do have the 70-200/2.8 which is a a 1468g lens on a D800E 1000g body. I even have the Telesco-Factory setup with a counterweight but think it's a bit of an art trying to get the right balance for the Polarie's max 2kg limit. I'm actually getting a longer shaft to see if it'll help (I opted that instead of another counterweight for travel purposes).
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