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womblemaster

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Everything posted by womblemaster

  1. http://www.excelsis.com/1.0/entry/orion-megavista-16.8mm-22-124.html?PHPSESSID=27ab0cc8166d43c7369c85fce877e7a0 I own this, best ep i have. HOwever, i use it quite a bit for birding, and its prone to blackouts. Very sharp image and more or less 0 chromatic aberation. This one is made in japan(or claims to be). Like alot of stuff, its all chinese made now......dip in quality perhaps??
  2. chl with skys the limit ....he told me in the past he can get a version of this ep. SO worrth asking.
  3. joy8899 think they offer full refund if not happy, chk with owner.
  4. http://www.kkohki.co...on HW eyepieces ` Nikon now offers the new hyper wide 102 degee FOV NAV-HW series eyepieces. This series consists of two focal lengths, the 12.5mm NAV-12.5HW and the 17mm ` I just noticed they do a set of 100deg eps. look smart, but overpriced. AM guessing these are pretty rare in uk!
  5. no point in going to the moon either...i can see it from here!
  6. would prefer a 45deg viewing angle......but i guess a small wallet=compromise! thanks for info )
  7. friend was at guisborough priory last night, and reported on her fkhk pages seeing meteors. dont really have any details tho...
  8. the first one looks very similar to the williams optics version. I bought one for 40 quid a while back, but its broke apart.....my diy repair didnt work too well(gaffa tape job) def gone bit fuzzy since the break....i have a lightweight scope i used whenon long walks (celestron 70) low quality glass, so its now paired with the busted prism..... `If something only works to about 30m` its not that its out of focus, its just noticeable poor quality image beyond a certain distance.....esp noticeable when onjects are against the sky: the image is soft and has chromatic aberation. These defects arent onvious when objects are relatively close.
  9. AM after a 45deg prism for occasional nature viewing. I treid one of these: http://www.ebay.co.uk/itm/Seben-s-45-31-7mm-1-25-AP1-Amici-erecting-prism-for-refractor-telescopes-/380449199893?pt=AU_Cameras_Telescopes_Binoculars&hash=item58948a1715 its not great....does ok upto 30m or so, then image loses sharpness and some colour aberation is noticeable. I have a vintage bushnell erecting prism, that is `straight through` and very good quality. However i want to have an angled one as well..... IS it possible to get one under £50, a decent one i mean...
  10. `I wonder when we will get astro zoom with AFOV like these spotting scope zoom. ` there used to be an adapter for leica eps to convert to 1.25. Leica 8.9-17.8 ASPH - 60-80deg, Zeiss 8.4-25.1 - 48-68deg, Swarovski 20-50x W these eps are ~£250 or more.....hard to find them 2nd hand, you would have to burn a 4 leaf clover to find any under 200 quid. its possible you could find someone who wants to swop for a wide angle ep, but really they arent easy to get hold of, at a decent price. `Meopta 7.9-18.5mm constant 66 deg.` dint know about that,,,made in czech republic or something?
  11. was discussing with someone today about the hole in reality that are baader hyperions. Ive have owned both the zoom and wide abgle eps. I cant understand why they dont offer the wide angles with a twist up eyecup. imo would work well with the high eyepoint. In the present format they suffer from blackouts....which could be solved with the twist up option. I cant see why they havent already done this. AM i missing something obvious? Surely am not alone on this?
  12. `be aware that you will probs have to pay customs charges` do you really need the whole set? decide which FL you would use most..... plenty of 30mm plossls on ebay or available from 2nd hand astro sites. post some wanted ads on here for whatever FL, am sure theres plossls of members sittingabout in cupboards; got half dozen myself! in my exp anything under $60 = free of customs charges.
  13. is this meant to replicate a certain zoom ? http://www.celestron.com/astronomy/deluxe-zoom-eyepiece-8-24.html specs appear similar...
  14. Cheaper way to get the xw ep is to get hold of a Nikon or kowa spotting scope ep (both 72deg) and use an adapter to make them 1.25. The xw eps are very nice, but personally I prefer my eps less bulky.....probably because i was using spotting scopes from age 9, and havent got used to larger size stuff yet. The kowa eps are harder to get in uk, am told the importer went bust few years ago, and its taken them a while to sort it out......second hand sources exist tho! Always a bargain around if you look.
  15. my main ep is a bit obscure: http://www.excelsis.com/1.0/entry.php?sectionid=22&entryid=124 Orion MegaVista 16.8mm use it with and without a screw in barlow lens.
  16. So if i am trying to pick between a `tmb planetary` and a 1.25" 12mm BST Explorer Dual ED eyepiece Branded "Starguider" IS the tmb, going to be vastly better optically? or is the performance of similar lvls?
  17. looked at too many eps in last 2 days and heads spinning atmo.....arent there some plossl style eps about that are ~70fov . I think Revelation make some....not convinced they would be great quality. What am wondering is the image quality of these worth losing 10-15 deg fov? I guess ideal scenario is 60-70 deg fov, eye relief 14mm+ and ~50 quid in price. Anyone recommend something? or have something similar for sale? Probably after 11-13mm focal length. this kinda thing.... http://www.365astronomy.com/12mm-magellan-wide-angle-eyepiece-with-65-field-of-view-p-17.html
  18. http://www.astronomics.com/main/product.asp/catalog_name/Astronomics/category_name/RV21A4CMAMU09N7NUM1WK2VX46/product_id/ATL09 they seem cheap and cheerful ? As glasses wearer, always after er of 15mm+ or anyone selling something of similar performance/price?
  19. BTW, whats with the 40x, 96x, etc markings on the Olivons? 40x in what? probably designed to fit in this: Digiscoping - Digiscope pictures, images, techniques, advice, equipment ? or mayne there is a specific olivon astro scope out there someplace. imo the brand is somewhat overpriced.
  20. I dunno if this is accurate, but it is interesting info. `BaK4 (Barium crown) has no advantage over BK7 (Borosilicate) when used in in a situation where the incoming light beam angle is very narrow. However in wide field applications such as low power binoculars there are advantages - increasing the brightness of the edge of field while having no effect on the on-axis image. There would be no advantage to BaK4 over BK7 to any part of the image for instance in a Binoviewer because of the narrow beam angle where generally they are slow systems without wide fields. The disadvantages of BaK4 is that it introduces more spherical aberration into the optical path than BK7. BaK4 also introduces more chromatic aberration than BK7. You may not notice this if your telescope optics are poor to begin with. BK7 is the clearest, most defect-free optical glass available for prisms. BaK4 is close, but not quite as good. That's ok for low power applications of a typical binocular, but not for high power low contrast situations seen in telescopes. For a high powered high f# telescope, with a very narrow light beam, BK7 would be a better choice for a prism. Similar applications are found in binoviewers.` Any views on this?
  21. BBC News - Nasa unveils Space Launch System vision surely its more efficient to use a `drop ship` type craft like the new virgin space ships. ie a carrier ship that returns to earth, that drops a smaller vessel near orbit. isnt the `blast off from earth` type rocket 50yearold technology? am i missing something or is it just american ego to require these big launch rockets?
  22. `the 3.5mm is a bit too much for my 200P,` I know the feeling, i had bought a Russel optics 6.7mm ep, 65deg fov, but tis not working well on my Wo Z66....need to try it in a 80mm scope. Am sure 8mm will be fine on my scope. Thanks for the info)
  23. Teleskop online Shop , TMB, APO , Dobson , Professionelle Teleskope, Kuppeln , Teleskopabdeckungen , Teleskope , Ferngläser , Teleskope online kaufen , APM Telescopes - Verkauf Beratung Herstellung UWA Okular 8 mm 70° Seems to be relatively new. Has twist up eyecup like a pentax. ANy one in uk sell these?? AM guessing none has purchased any of these yet?
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