alacant
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Everything posted by alacant
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Hi. There's something of nebulosity I think. Maybe worth stretching again?
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I used a coma corrector too, although it's not that bad without and you avoid those halos around the stars. HTH
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Hi. I had the same. Third time lucky, having started an optimistic 30s then 60s, I finally got dust with a 6" f5 at two minutes. HTH.
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Hi. There are some good 2" eyepiece deals on AliExpress. This 32mm gives amazing views. HTH.
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Well done. I'm sure you'll like it. Clouds in Durham for a 150 f5? You should see what a new 200 f4 can do in Alicante...
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Hi. I have one. It makes my old skywatcher look flimsy. It seems to be setup for photography, with a lot of back-focus and an optional visual extension for eyepieces: mine has the hexafoc focusser and short tube with a big secondary. It takes sharp photos. HTH.
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Hi. I find that too. I think it's that the sky is getting darker as the night proceeds: between snaps using APT you can see the histogram moving progressively left. HTH.
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...and is it for what I think it is; to be able to mount the camera at 90º? TIA.
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Ah, OK. So it can be used if you want to mount the camera vertically? Does the dovetail of one you cite fit standard vixen clamps? I've often wondered how best to turn the camera around 90º. TIA.
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Aw. And I though I had the cutest:(
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+1. I think it's the accompanying explanations -written instructions- which put the fuss into it. If someone had given just a one liner, get a Cheshire and make it look like this, I for one would have got there quicker. HTH.
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Brilliant. There are some really awful foreground stars which ruin lesser photographer's efforts. You've got them under control. I reckon a 1-pixel shrink with 2 pixel fuzz Magic under a fat-star -save the mask before you denoise- ST mask would really nail it:)
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StarTools Magic. It's magic:)
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Hi. I think one only obtains a regular ellipse -the shape of the secondary- by taking a section through a cylinder. A conic section -the light from the primary- has the minor axis displaced toward the 'fat' end of the cone. I can only explain it by doing it:
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Hi. At f5, the secondary should not be centred. Centre, yes. Then displace. It looks something like this. HTH.
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Hi. Do your flats clear the problem? Unless the issue is affecting your photos and the flats are doing their job, I'd forget it. I think the procedure is to centre the secondary then displace it 3mm both toward the primary and away from the focuser. But life is short... HTH.
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Hi. Even on modified cameras where the camera ir filter retained, it's never strong enough and the ir records as unfocused visible, especially with refractors, no matter how APO they maybe. One of these will tighten the stars back to normal. No need to go brand name. They all come from the same factory in China. AliExpress or eBay sources are fine. Around €15. Add a wratten#8 -marketed as fringe killer at 10 times the price- and you really are in business. HTH.
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Hi. Here's my first snap with a camera attached to a telescope. 1999. FujiColor film. You peered through the illuminated eyepiece and guided by keeping a star on the cross-hairs using the hand controller. I resurrected the telescopes last year. How things have changed. Nostalgia.
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The clusters look amazing in your composition. Hope you don't mind, I'm learning colour balance ATM. I took the curves down a bit. Probably way off now! Clear skies.
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Ah. OK. Is this with the sw cc? I was getting D shaped stars to one side of the frame when the camera was aligned with the focuser knobs. On my reflector, it takes the focus tube 1cm further into the main tube and so interferes with the light path. Moving the mirror caused vignetting so I cut the end off the focuser. Am I correct in believing that the gso cc allows focus at the normal position and so negates the ingress? TIA.
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That's a really nice image crying out for the rather nice ST Life module. Worth a try?
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Hi. I've a sneaky feeling that some outlets buy them in bulk, write Baader or Optolong on them and knock 'em out for 10 times more;)
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...but far less jump-on-the-bandwagon-oh-so-predictably boring!
