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benjii

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Everything posted by benjii

  1. I found this while browsing the interwebs this morning... "Target Asteroids! is an opportunity for amateur astronomers to participate in a long-term citizen science project that will contribute to basic scientific understanding of near-Earth objects (NEOs)." The OSIRIS-REx Mission - An Asteroid Sample Return Mission - Target Asteroids It's in partnership with NASA, I would imagine due to their dwindling budget, to help them track NEOs. The only requirements are an 8" guided scope, a colour camera and some basic AP skills. I think it's a nice opportunity to track, what many of us may not have realised to be, asteroids. Unforunately, that rules me out with my 12" dob.
  2. 100) Driving 270 miles to view an "excellent condition" scope, only to find out it's not, it's all rusted and the mirror is knackered. Then driving back and getting stuck in a killer traffic jam on the M6.
  3. Yes, I concur. However, the Hotech centers itself in the focuser in order to counter the inaccuracies of thumbscrews. Therefore, is in a different position than an eyepiece would be.
  4. I think Hotech's are overpriced for what they are, it's cheaper to get an adjustable laser collimater and a centering ep adapter and you still get the same performance. That method is arguably more accurate than using a Hotech as well. Due to the Hotech centering the primiary with the secondary to the center of the focuser, but when eyepieces are used they're off center due to the thumb screws. If you use a centering eyepiece adapter, it ensures both the laser and eyepiece are centered, therefore the light is perfectly focused into the middle of the focuser. However, in saying all that, I bet you none of us would be able to tell the difference between the different methods... just food for thought!
  5. I've not been out tonight as it's cloudy, but it won't be anything man made as we can't see that from Earth. It could just be a spot of dust on your EP or filter!
  6. I've got a 300p flextube and I have 3 things I find to be vital to collimating quickly and accurately. An Orion precision centering adapter, my laser and my cheshire. It takes less than a minute to do the adjustments on the middle of Dartmoor with the laser, then I just double check with the cheshire and it's always spot on.
  7. Thing is though, GSO EPs and scopes are near identical to other branded products. Some plossls are the same as well as the Meade Revelation range. I think people just mistrust them as it's not a brand they're familiar with.
  8. I love your picture, it makes your scope look all epic and huge!
  9. Looks like the 12" Meade Revelation to me. Lovely site by the way.
  10. I took my new flextube out to my dark site for the first time and I had a look at our familiar friend the Orion nebula, it's something special through a 300p! Anyway, I digress, I was trying to focus on Jupiter with the 7mm and I couldn't focus at all, it was just going past the focus point. Then I tried the 26 and I focused but there was just too much light and no detail. I had collimated it perfectly before we left and again when we go there, plus I did a star test and all was good. I noticed the moon was "wavy" like a road on a hot day, which I believe is from the mirror cooling down. Could this have prevented me seeing Jupiter in focus? The moon stayed "wavy" till it dropped behind the trees, so for well over an hour. Is that usual?
  11. Anyone? Trying to debate whether or not I should go to my dark site tonight or tomorrow.
  12. On 7timer, there's the blue to grey circle for astronomical seeing. My question is, what is that based on? I've got a few clear nights in a row with 0% cloud, however, astronomical seeing is the first grey circle. What sort of effect is that going to have?
  13. The 200p is a wonderful scope and easily gives you the best value for money in its price range. However, as tsmith001 said, it does have a couple of flaws. I highly recommend you get a diagonal for both your focuser and finder, otherwise you'll be bending over backwards... literally. *edit* Just to clarify, a diagonal is a right angle device that allows you to see the image at a 90 degree angle from it's source. It's perfect for cases when you want to look directly up but you finder is pointing at the floor.
  14. How about the fundamental laws of quantum physics? That energy is a constant. By that I mean it cannot be created or lost, just repurposed. Following that train of thought, then surely the universe has a limit. Perhaps it just expands until all energy is used, then rapidly scrunches up again causing the big bang.
  15. benjii

    AB&S

    Yeah, the excellent condition scope had algae growing on it, the dob mount had chipped and bubbled paint and all the bolts were completely rusted and the kicker.. the primary had all sorts of things growing on it, algae was the least of my worries. He tried to tell me it just needs a clean, I said it would be completely tarnished and need a total recoat which, with the state of the rest of it, wasn't worth it. Fortunately though I bought a 12" flex tube from a chap on here and that actually was in good nick!
  16. benjii

    AB&S

    All the above is mainly common sense and should absolutely be followed. However, there's little protection against turning up to find out the item is not as the photographs show or is described.
  17. I'm not to sure on laser pointers, however, I just sold my 10mW one and that was very good for what you described.
  18. benjii

    AB&S

    Oh I completely agree with all that. I went to look at a scope and it was in awful condition, I don't want someone to drive down from Scotland thinking they're going to get a good deal and be disappointed!
  19. I didn't see the second picture. I completely agree! First is a 150 the second is a 200. I hope it really is a 200 and someone isn't buying a 150 that is mislabled. *edit* I enquired just to be sure, "wrong pic sorry". So I guess it actually is a 200p. I'd buy it just for the EPs and sell the 200p if it's not too expensive.
  20. I would disagree actually, if you compare them it looks identical to the 150p photo. eBay - The UK's Online Marketplace SkyWatcher Skyliner 150P Dobsonian Telescope Code:10716 | eBay The key is the finder, the standard 200p 9x50 finderscope is too heavy to put on a 150p so it has a thinner, lighter version.
  21. benjii

    AB&S

    It might just be me missing the forest for the trees, but I couldn't find a complaint email or an ad review feature. Only reason I ask is because I had a bad experience when I went to look at something that clearly wasn't as described by the guy in his ad or via email and I don't want anyone else to make the same mistake. Can anyone point me in the right direction?
  22. Don't forget you can convert your dob into a push-to if you want that added ease of finding things.
  23. Ah, that's just the motorised version, for astrophotography you'd need goto or at least tracking.
  24. That's great! You should look at my carparks link for places to observe, Hound Tor and Wind Tor are very close, I drive through Ashburton to get to them. Fantastic viewing.
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