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nightspace

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About nightspace

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  1. Hi John For the last few years I've been coming out to Aus with an Opticstar AR80 and a photographic tripod. In July up in New England the southern skies are spectacular. My little portable set up has never disappointed. But I am now planning to upgrade to an Opticstar AR90 Gold with a small Ascension Alt Az mount for my portable set up. I think I'll stilll be able to bring it out on the plane fairly easily. These are good quality pieces which cost comparatively little. By the way, I used to have a 300mm dob, but it didn'get used very much. And it never made it out to Aus! John
  2. Hi Arad 85 Do you have the specs for these stronger springs? John
  3. Here's my take on this. Ideally, for visual use, you want two scopes: one for deep sky, one for planets. However, if you are starting out and you are not sure whether your interest in astronomy will last, it wouldn't be wise to spend too much. So my advice would be to get a dobsonian 8" - 12" and use this for a year or so. It will show you all you need to see when starting out but it will be particularly good for deep sky objects. Then, if you find you are getting enough cloud free nights, and if you want to take the interest further in astronomy further, purchase an apochromatic refractor (80mm) for i) grab and go, ii) very wide fields of view, iii) imaging. Of course, you'll also need to purchase a good mount as well. I purchased a 12" Revelation dobsonian just before Xmas and I have only had it outside once. I caught a brief glimpse of the Pleiades a few weeks ago before the clouds blew over. The scope cost me £499. The way things are looking at the moment, I am glad I didn't spend any money on more expensive equipment. Still, if we get a long run of clear nights, my views might change! One final thing: if the sky in your area is heavily light polluted, you won’t be able to realise the full potential of the dobsonian’s light gathering potential. I might then start with the refractor and forget about DSOs.
  4. Thanks for this information., Haitch. I have read elsewhere that there is a considerable amount of distortion with the Moonfish at f5. It might be worth waiting a little while until I can save up for the much more expensive Nagler. From what others have said, it would seem to be worth waiting. ... on the other hand, I just found this advertised on SGL: "MEADE SERIES 4000 32 mm SUPER WIDE ANGLE EP 2" fitting , LNIB & with Meade bolt case & box. NOTE: - Made in JAPAN. £100 plus postage, collection welcomed" What sort of FOV would I get with that? (focal length 1520mm) John Meade Series 5000 Ultra Wide Angle
  5. I think the Revelation 12" is pretty reasonable pricewise, but I was unaware about the inferior quality of the mirrors. Are you able to provide some hard facts about this? Don't Revelation use the same mirrors that are used in other dobsonians? By the way, I am pretty strong (do weights) and I wouldn't like to have to lift anything bigger than the 12". It's not just about having the strength to lift the thing; you have to do it carefully whilst carrying it through the house and out of doors avoiding all obstacles! You also have to lift the tube into the mount in the dark.
  6. I can't say much about comparison of quality with other scopes. All I can say is that the quality of the Revelation is very good indeed. I think the scope is made by GSO in Taiwan who seem to have a pretty good reputation as manufacturers. By the way , I think I stated that it cost me £440 from Telescope House. I should correct this. Ex VAT it cost £433.91. With VAT it cost me £499.00. There were no shipping costs and delivery took approx 24 hours (FedEx: T.Wells to North East Cheshire). I was able to track its progress on the FedEx website!
  7. Many thanks to Arad85 for this very comprehensive review. On the basis of this report, I purchased my own Revelation 12” just before Xmas. I am very happy with this new scope. It was delivered next day despite half the roads being covered in think snow. All the pieces were well packed and I managed to assemble the scope fairly easily despite the fact that there were no instructions. (I notice that Arad85’s scope was accompanied with assembly instructions). I was worried about it taking up too much space in the house, but it stands neatly in the corner of my study. It doesn’t look out of place at all. One thing I like about this design compared to the truss design dobsonians is that the mirror is completely enclosed, and so this should help to keep the mirror clean of dust. Since it arrived, there haven’t been many clear nights, but I did get a glimpse of the Pleiades a few nights ago before the clouds came over. The views were stunning. The only other scope I can compare it with is a small Vixen reflector (114mm) which I purchased in 1992 in Australia. That scope cost me over AUS$1000. The Revelation cost me £440 and yet it has 3x the aperture. I suppose this is an indication of how things have changed over the last few years in terms of ‘aperture cost’. The only thing I was somewhat disappointed with is the field of view, which I calculate to be 1.4 degrees. I suppose with a 1500 mm focal length it was never going to be very wide even with the 2” x 30 mm Superwide angle (70 degrees apparent FOV) EP that Revelation provides. Can anybody recommend an EP for this scope that will give me a much wider FOV? By the way, since I purchased the scope I have bought an Orion collimating eyepiece from the same supplier. With both purchases I have found Telescope House to be professional and reliable.
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