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timwetherell

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About timwetherell

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  1. The camera needs a real image on the CCD which should sit in space at a distance exactly equal to the focal length of the primary mirror. The eyepiece magnifies this real image and in effect turns it back into a virtual image at infinity. So the optical centre of the eyepiece will need to be beyond the primary mirror focus point by a distance equal to it's own focal length. Which in the case of say a 40mm, is quite a bit.
  2. Had a set of Huygens eyepieces with my 60mm refractor as a kid. Bought a set of really cheap huygens EPs a few years ago for about £10 just for the amusement putting them in the 60mm finder to remind me what the views used to be like. Of course my equipment's better now but my eyesight isn't a sharp as it was back then!
  3. Well done. yes, i think a 12" is probably the beast for the job. in my 7" I thought I saw something but wasn't able to navigate by those 14mag stars in a row by the supernova because I really couldn't see them. If it's gets to mag 12 or 13 then I'll definitely have another go visually
  4. Nice shot, caught lots of detail in the spiral arms too!
  5. Thought I'd seen it in the 7" but looking at my sketch it's possibly a bit low. In my photo the two foreground stars below look of similar magnitude so if you saw those too, you almost certainly bagged it! Might have another go tonight
  6. Anyone been watching the supernova in M61? I think I could just see it visually in my 7" scope (possibly with averted imagination!) but shows up well in a 15s exposure
  7. I'd stay up late or get up crazy early for something really special like a transit of Titan, but generally I'm a civilized hours astronomer. If it's clear between tea and my bed time i'll observe if not then I won't. The important thing is to do what makes you happy. Amateur astronomy is a hobby not a duty, so whatever makes you enjoy it most is the right approach. I have a friend who's happy to stay up all night imaging and that great for him, but for me 11pm is brandy and bed time
  8. Thanks Dave. It was taken through a WO 66 ed apo. Camera was a sony a7s.
  9. Actually that's not a bad idea! I might do that
  10. It was very beautiful wasn't it! my preferred view was binoculars too, telescope was a bit too 'zoomed in'
  11. Interesting idea I hadn't thought of doing that. Will give it a try
  12. I've split it a couple of times in the UK with a 7" so you should be able to with an 8. It all comes down to atmosphere. When I lived in Australia and sirius was almost overhead the pup wasn't even really much a challenge with a 7", one could see it 90% of the time. Same with Antares, quite difficult in the UK which is a shame because it's one of the most beautiful doubles!
  13. Miraculously we had clear skies last night and was able to see venus amongst the Pleiades for the first time in my life. Very cool, especially being able to see venus' half phase! Anyone else get any nice pics? I was hoping to capture some of the nebulosity but venus was so bright it swamped it.
  14. 2018 I believe, it's been raining here most of 2019 :D
  15. Actually yes. it all came down to local sky quality. Even the slightest hint of haze will totally obscure them and we often have a very slight haze here. But on a particularly clear and haze free moonless night, they were relatively easy! So a bit like sirius B really, all seems to depend on seeing and transparency
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