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Latest Posts
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Not the only one, John. I'd have my Morpheus range over those any day (or night 😉). -
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Weather here hasn’t been good recently however, there was a brief window with a forecast of only moderate jet stream on the 5th for me to try out some of the suggestions made by Geof and Kostas. These being: 1. Use of a barlow to move from F10 to F20, for better sampling (Camera has 3.75um Pixels so 18.75, probably optimal). 2. Increase my exposure from 5ms (typically 195 FPS) to 10ms. 3. Increase my histogram up to around 80-90% I would like to say everything worked out however, I made the mistake of switching from Sharpcap to Firecapture. Now that shouldn’t be a problem other than I didn’t know there was a tick box in a camera sub menu for high speed capture! This meant that far from reaching 100FPS I only managed 50FPS on average. So far too slow to freeze the seeing! However, I carried on by taking 9 x 60 second videos between clouds. These I processed through PIPP, Autostakkert, Registax, Winjupos and finally Astrosurface to produce the image below. Now I know it’s not great but given the conditions and frame rate I feel it tells me that I am going in the right direction. Unfortunately we have had nothing but rain and snow since so have been unable to check out the higher frame rate capture to see if I can finally pull out more fine detail. Thanks for looking Ian -
Have you checked your webcam can be controlled with say sharpcap or fire capture? -
You may wish to consider a software solution before, or as well as, spending money. It will not be anywhere near as good as a decent mount or a decent autoguiding system but it may well help. Essentially, find out the difference between a true point object and what it looks like after it has been through your system and onto the camera. That is the point spread function (PSF) and is the combination of seeing, diffraction effects, optical misalignment, poor guiding and more besides. Once you have your PSF you can then feed it into deconvolution software. As I said, it will not solve all your problems but could well improve your image quality. From my experience it can improve resolution by a factor of somewhere between 1.1 and 2.0 and I have a good mount and optics. What I rarely have is superb seeing. Do not expect miracles. Do not use it if you wish to perform precision photometry or it will destroy your measurements --- that is why I rarely use this technique. One further thing: it is likely that a half-way decent autoguider will improve the results even after getting a better mount, so your investment is unlikely to be wasted. At the very worst, it won't harm anything.
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Just about finished my 'Christmas Crafting' for this year. Spent the day painting with Hammerite. All I could do to restrain Mrs H from sniffing the methylated spirits I was using as a solvent. She has always liked the smell! The 'Spirit of Christmas' and less than £5 a bottle. Absolute 'stocking' bargain for the woman in your life!· 0 replies
George in bed with the December edition of Astronomy Now.
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Hi Grant,· 1 reply
You recently re-instated my ad"Celestron CPC 9.25 XLT GPS set up £1300" . Can the block on this topic be lifted so replies can be posted or indeed I can amend the ad if Iwish?
cheers
Dave
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My birthday today. Yay!· 0 replies
Spent the day making arty farty metal stuff in the backyard under a very blue sky. Mrs H made lobster linguine and caramel panna cotta (served sequentially and separately) for tea and I watched a fullish Moon rise through the window as we ate.
All in all a very fine day for an old bloke in Lowestoft next the sea.
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