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  • Latest Posts

    • Thank you Bryan!  Yeah I'm pleased with how it came out in the end. This is easily the most data I've ever captured on a single image, and I really noticed it during processing.  It's been a frustrating 18 months for sure, and I won't bore you with the details, lol. I'm just happy to be back in the game again 😃
    • Thanks Olly ☺️ I had a hard time processing this. I spent 4 nights on it, and had to start over a couple of times. This was my first time incorporating Ha into a broadband nebula image. I initially spent a fair amount of time looking up how to do it via continuum subtraction using pixel math in Siril. It worked, but then I tried just adding it in PS instead and found I could do exactly the same, only with so much more control, so I went with that. It was also my first time using Generalized Hyperbolic Stretch. I'm very impressed with it. I knew it would tame the stars well, but I was worried I would lose some of the dust along the way, but it seemed to work well. 
    • Very interesting report 👍 The more I read about the SM 125, the more I would like to try one 🙂  
    • decided to go with m106 lol it was a bit further from the moon 1 hour ish until clouds. going to try veil nebula if clouds go away as i think its high enough
    • I was observing this evening with the C8 and started wondering how the SM125 would compare when I was getting softer views at higher magnifications and when I tried a double with the C8 it highlighted quite poor seeing, I think a combination of local rooftop heat and tube currents although the C8 had been out for a couple of hours. So I swapped scopes and went back over the same targets again with the SM125 at similar magnifications to compare. Here's what I thought... The C8 was at about 230x and 345x with binoviewers. The SM125 was at about 254x and 317x with binoviewers. Porrima - when the moon in the C8 was looking a bit murky I moved over to Porrima to check out the seeing more objectively, and defocused it was showing poor seeing and constantly moving/breaking diffraction rings. In the SM125 the view was a lot more clean and still and with fewer diffraction rings. A straight win for the SM125. Hortensius Domes (Lunar 100, number 65), the dark/light contrast and resolving the domes was slightly clearer in the SM125. Copernicus H (Lunar 100 number 74), the crater was resolved about the same, but the dark halo was slightly clearer in the SM125. Pico mountains (Lunar 100 number 23) I thought I got slightly more detail in the C8 but a more contrasty view in the SM125. Plato craterlets (Lunar 100 number 83) it wasn't a good time to try but I was ticking off Lunar 100 objects so had a go. I thought I could (barely) make out 3 with the C8 (and they didn't look like craterlets, they looked like slight imperfections in the floor), I don't think I could see any in the SM125, but I wondered how much difference an hour might make as the lighting would have been slightly worse for the SM125. Lambert R (Lunar 100 number 78) - a ghost crater, I thought this was slightly clearer in the C8 but again I wondered if the lighting was slightly worse by the time the SM125 had a go. In other respects the C8 is higher workload to operate, I have to put a separate dew shield on the C8 and it needs 2 counterweights rather than 1 on an EQ5 as the C8 is a similar weight to the SM125 but it is fatter so its centre of gravity is further away from the counterweights , the SM125 focuser is better, the C8 takes longer to acclimatise, and I don't have to think or worry about collimation with the SM125. Overall I thought the SM125 did slightly better on the views today, and if ease of use is added into the equation it was clearly better, but the C8 is no slouch. It would have been good to have them side by side in the field to eliminate some of the variables in comparing them but I don't have the facilities to do that.
  • Recent Topics

  • Recent Status Updates

    • David Smith

      Blown away by the Aurora Borealis last night, fingers crossed we might get some more tonight 🙏
      · 0 replies
    • Earl

      We are total surronded NESW by Aroura !!!!!
      · 0 replies
    • Earl

      broken cloud time to run a timelpase from the back window, might do star trails later as its saying clear so far
      · 0 replies
    • Minhlead  »  inedible_hulk

      Hi there,
      I can see you had a Lunt 50mm for sale. By any chance it's still available?
      · 0 replies
    • Hawksmoor

      Had a brainwave as to how I could make a conversion gizmo to attach to my homemade spectrometer to enable it's use for nebulae. The aluminium bits arrived from EBAY this afternoon. I feel an astro project coming on!
      Finally got the LVST (Lowestoft Very Small Telescope) reprogrammed and catching 'meteor pings' again. Everything went west after the electrical supply to the shed went down in the last major storm deluge. All is up and running again. It really does pay to write down what you have done and programmed when you get old. I'm 74 years old you know!!👴
      · 0 replies
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