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Roy Challen

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About Roy Challen

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    Proto Star

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    Watford, Earth
  1. Got my first pair of bins from the Tring shop. My brother-in-law has them now. Sad to see DH go, but at least there is still an astro-shop there: Tring Astro, and very good they are too.
  2. It was only last week that you were angering 'them up there'!
  3. Like several have already said, 2003 was a vintage Mars year. That opposition was the reason I got my first telescope, a department store special - it was a Bushnell I recall. The optics weren't that bad really, but the mount was. However, I didn't know any better, and I still enjoyed the view. In the intervening years, the scopes I had were decent, but lacking in aperture and f/l, and between 2016 and this year I didn't do much observing. So the best view I've had was last Saturday, through my 100 RS. The funny thing is I am far more willing to get up at a very unsociable time in order to get a good view now, than I was 17 years ago!
  4. These really are causing a stir, so much so that even I, a long f/l refractor diehard, am seriously tempted. I just need to find something I own that worth enough to sell!
  5. Here's my vote! If it made you happy, and was easy to set up, get another one. You might have to wait a little while but they're not so rare that you'd never see one come up for sale.
  6. After reading the thread about StellaLyra scopes, I think this definitely sounds possible.
  7. Hi John, It does have foil spacers but they don't appear to have moved relative to each other. It was only the flint lens that looked like it had moved as the witness marks from the spacers were about 20-30 degrees offset. Interestingly, on Saturday morning I looked at Mars through both the Skylight and the Tal, and other than the difference in brightness, the views were very similar. I forgot to star test though
  8. You could also try sending your CV off to the various engineering companies in the UK that build satellites/equipment relating to the space industry. https://spacecareers.uk/?p=job_search
  9. I only used hand force when tightening, just enough to stop any rattling.
  10. Yes, it's a bit strange. I don't know how it came to be that loose. I use a Tal diagonal, which is collimateable to some degree, so that could be of help.
  11. Hi John, Good point, I haven't checked the collimation, but the lens cell isn't adjustable anyway.
  12. I've been getting back into my visual astronomy since Comet Neowise graced our skies, buying new stuff and whatnot. I got my astro stuff out of the loft, the big Tak mount is now in a place where I can deploy it without necessitating a visit to the chiropractor, and the Tal is ready to go as well. I also got my Skylight out of the loft, but on inspection, I found there was a rattle from the front end. It turned out to be one, or both, of the lenses rattling about in the cell and I could see they had moved relative to each other as the marks left by the foil spacers were in different positions. On unscrewing the cell, I found the retainer ring almost completely undone, however, it seemed to be just a case of move the lenses so that the marks line up again - I just went to the nearest marks - tighten it back up and crack on (jeez, don't say crack near a lens, please!). So I did that, and checked the view on a tree branch about half a mile away. It seemed ok, but at higher mags - more than x120 or so, the view didn't seem to come to focus properly - it didn't seem as sharp as the same view through the Tal. However, this scope used to provide sharper views of stars than the Tal, so I think something isn't right. It could be that I have moved the lenses to the wrong marks, or they are correctly aligned to each other, but not with the cell. Another problem is there are no marks on the side of either lens. I think before taking anything apart, I'll check the view with an actual star a night, just in case. But if it isn't that, I'll have to take the cell apart. The plan would be something like this. 1. Mark the positions of the spacers according to the witness marks (luckily, both lenses have marks on them-I didn't clean them). 2. Try each combination in order against a star, Polaris for convenience. 3. If the diffraction rings look good in any of the 3 positions, consider myself lucky. 4. If the rings look poor, mark the crown and flint, say, position one and then mark one or the other every 45°, and check each position. When the best is found, refine from there. Obviously, this will have to be done in the dark, but it doesn't have to be done all in one night if I keep a record of what I've done. So, what can go wrong?
  13. Happens in every hobby... ...and I never thought I'd see the day when someone said this!
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