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Yawning Angel

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Posts posted by Yawning Angel

  1. My moon app suggests this is 99.2% illuminated, day 1 of the full moon - so 'mostly illuminated' 

    Some evenings it's hard not to feel like the weather is specifically being mean to you. The glorious clear sky to the west gave way to a bank of cloud in the east, hiding the moon on it's very edge when I set up. Ah, but that westerly wind will clear it up nicely, thought the poor, naive astro-imager! Nope, I watched for about an hour as cloud formed, just as it hit the moon. 

    The battle of wills ended as the sky got bored of tormenting me, and graciously allowed 1000 frames each for RGB with little room to spare. Remarkably, the frame quality after a rinse through PIPP allowed for 20% stacks in AS!3

    PixInsight handled aligned the 3 resulting frames, RGB combine and sharpening. PS then for Camera Raw Filter gently teased out a little colour and there you have it

     Skywatcher ED80 (@510mm) / iOptron CEM60 / ZWO asi1600mm-pro / Baader RGB filters.

    Moon 08-03-20.png

    • Like 14
  2. The principle is that you keep the optical surface just above the dew point temperature, so it doesn't fog. The air volume inside the tube isn't heated, and so is close to ambient temperature, reducing air currents in the tube

    I'm not a reflector user, but you'll likely want to heat the secondary, the finder and maybe the eye piece

  3. I think the usual solution is dew heater bands on the appropriate optics, but the obs itself at ambient temperature

    Everything ends up soaked at the end of a session, so a dehumidifier (or very good ventilation) reduces the risk of mould and rust when you close up

    • Like 1
  4. Hello,

    I've had a Celestron AVX for about 6 years now, and it's served / serving me quite well, but it is clearly a limiting factor in my AP, so I'm looking to switch up to a more capable and reliable mount for my observatory. The AVX is not hopeless, but is the world of backlash and quite inconsistent in performance - plus, a bit noisy in a residential setting (I've had to limit the slew speed to keep it to a polite level)

    At the moment I mount a Skywatcher ED80 + camera, EFW and associated kit, but may one need to take more load or longer focal lengths in the future.

    The shortlist is currently between a Skywatcher EQ6-R pro and the iOptron CEM60 (nonEC), both fall inside the budget of 'sub £2000' and seem perfectly capable. I'd prefer new from a retailer, rather than pre-owned for the peace of mind

    Whatever I go for, it'll be pier mounted, PC controlled from off the mount and parked horizontally. I run SGP or Sharpcap depending on target and CPWI for pointing / sky-model. "Celestron"PWI would have to go, likely replaced by Stellarium? So, I'm looking for thoughts and experiences, help and advice as I want the mount to feel like a significant upgrade, and be reasonable future proof

    Help! I have analysis paralysis!

     

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