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AliMac

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About AliMac

  • Rank
    Nebula

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  • Location
    Bingham, Nottinghamshire
  1. If you're aiming at something for the kids to enjoy as well, you can't go far wrong with a Dob. The eyepiece would be at just the right height for them and it's a really simple setup procedure. That is to say, you just need to take it outside! A skywatcher 150 would fit comfortably inside your budget and give you about £150 left to buy an adaptor for your SLR as well as a collimating eyepiece.
  2. Well, first light. The images seemed just as sharp as with my refractor, and I couldn't make out any visual problems caused by the blemish on the mirror. I'll see how I get on with it over the winter, and I'll probably try to get a recoat next summer. I think it probably needs collimating as well, but I think I'll get by for a while at least. I didn't have much time tonight, but got nice views of M13 and M31. With the former I feel sure I could make out some speckliness with averted vision, which is definitely a step up from my 90mm. I really need to look into getting a right-angled finder though; my neck is killing me.... So, sigh of relief, I'm reasonably satisfied that I've not wasted £122. Thank you all again for your replies. I'm constantly amazed at just how helpful everyone is on this board. Cheers, Ali
  3. Thanks for that. I hope it won't be necessary, but it's good to know that the nuclear option is likely to have the desired effect! I'm also very reassured to read the above! Is it a question of the amount of light reaching the eyepiece being diminished by a mucky/scratched primary, or should I expect visual effects as well?
  4. Having spent the last couple of hours looking at it, I think you're both right about it being scouring marks. Also, from what John said above, and from other info gleaned from Google, it seems that the coatings on this model are prone to deteriorating. I guess someone saw the black dots, thought they were dirt, and had at them with a cloth causing a bit of scratching to the surface of the mirror. If it turns out that the scratches are too severe, will recoating the mirror solve the problem? I presume the process involves removing the reflective layer. Are telescope mirrors coated from the front or the back? What I'm getting at is whether the scratches to the mirror surface would be removed by recoating. I've just had another try on a more distant chimney pot and the view seems fine. I'll give it a try on stars as soon as any deign to appear. I imagine that'll be in a week or two. Thanks again for all your replies.
  5. Thanks for all your replies! I now have the scope safely in my possession. I've had a quick look through it at a neighbour's chimney pot, and the view seems ok. However, the mirror has quite a large blemish on it, as you'll see below. I have no experience of mirrors, so could anyone tell me if this is sufficiently dreadful as to warrant a clean, or even, heaven help us, a recoat? I suspect I won't get a chance to test it properly for a while yet, given the clouds that are rolling in even now... Ali
  6. Hi Luke, I can't seem to extract them from the Ebay page, but I think this link should take you to it; I should have said thanks for googling it earlier! Ali
  7. The seller provided four pictures, which seem to show it in good nick externally. One shot showed the primary, which the seller indicated may need cleaning. I think the shot confirms that, but I feel reasonably confident I can do that. Hey ho! I'll find out tomorrow!
  8. Hello all. I wonder if anybody has any experience/knowledge of the above. I just bought one on ebay for £120, and at the moment I'm feeling like it was a good buy. That said I havent seen it in the flesh, as I'm picking it up tomorrow. I've been thinking of getting a Skyliner 200p, and I really wanted to know how the two compare. Does the Revelation have a parabolic mirror for example? Also, apologies to anyone I pipped at the post for it... Ali
  9. Maybe try this instead, courtesy of Phil Plait's Bad Astronomy blog; Canadian Telescopes - MIRA 80mm Alt Az Telescope - (Astronomers Without Borders Program Edition) - Telescopes.net from Woodland Hills Telescopes: Sky and Telescope, Astronomy Telescope, Binoculars The setup looks pretty good (nice tripod, at least), and if you donate $20 they'll give a telescope to a group in the developing world. Don't know if it's worth doing from the UK though.
  10. Just picked up a pair from Lidl this afternoon, and they seem pretty good for the price. The twist-up eyepieces aren't great, but visually they stand up quite well next to my wife's Helios 8*42s which were four times the price. The build quality isn't anything like as good though.
  11. Do it! You'll know if it was a bad idea if you don't like the view. Anyway, it's not going to break anything, is it?
  12. If you've any liking for prog rock the Star Walk soundtrack will blow. your. mind.
  13. Ignore all of your eyepieces and barlows, except for the 20mm. That's your wide angle lens, and will give you your best chance of finding it in the first place. Then it's a question of focus. The white blur indicates you're in the right place, so you need to wind your focusing knob all the way in, and slowly wind it out while looking through the eyepiece until you resolve an image. Apologies if this sounds a bit patronising, but it's best to try the basics first!
  14. That was mean... Anyway, it's made up for by my greatly improved eastern views. And I don't have to trim the blighter anymore.
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