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azrabella

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Everything posted by azrabella

  1. This eyepiece delivers a pure-white image with outstanding sharpness and contrast True High-Transmission- (HT) and Multi-Coating (MC) on all glass-air-surfaces offer a brilliant image while showing almost no internal reflections. Eyepiece itself is in near mint condition. Asking £34 inc postage UK
  2. I thank you guys for your input, because of my limited expenditure I think I'll have to go for the Panaview 32mm, unless someone can suggest a better one for the same (ideally second hand) price.
  3. I'm looking for a 2 inch Panaview of between 26-32mm or something similar.
  4. Looking for a 26-32mm 2" 70 degree fov eyepiece and am confused by the plethora of generics out there. Initially interested in a Panaview, but on seeing very similar spec eyepieces I am wondering if they are not all coming out of the same factory. Prices sem to be reasonably consistant but how about quality? So now I am somewhat confused. Most, it seems, say something like SWA 70° 26mm - see below, but do not mention brand. Any advice on this.
  5. I will just as soon as the clouds part - don't hold your breath though, that might be some while.
  6. I recently purchased and am eagerly awaiting arrival of a new to me (used) 17mm eyepiece that the seller (though not the user) informs me was Skywatcher's first foray into wide-angle eyepieces from c2003. It appears to have a dual fit format with a 70 degree fov, with the same configuration as a Meade 4000 Smoothside? I cannot find any reference on t'interweb, and was wondering if any of you clever slueths could identify it for me. Also if it is dual fit, then in 1.25" mode what happens to the fov, or is the inner barrel removable??? I don't have a clue. Images supplied.
  7. Hi, any of these still for sale - looking especially at the 40mm. Regards Rob
  8. NOW SOLD. As new, pristine optics, capped and boxed. Not half bad. Each features fold down rubber eyecups and a generous 16mm eye relief for viewing comfort, making them suitable for spectacle wearers. Each model features the security of rubber grips and the eyepiece barrels are threaded for standard 1.25" filters. Price £50 inclusive of postage UK.
  9. £15 includes post to UK. Metal body, rugged grip, cemented doublet fully multi coated (FMC) achromatic lens, results in high resolution, contrast and colour correction. 1.25" barrel. Boxed with both end caps. In new condition - no longer used as I have moved to a Baader Barlow.
  10. Must be clean, preferably boxed with end caps.
  11. ...is what I'm after, preferably with end caps and boxed. But will consider without.
  12. I'm thinking of doing some visual (white light) solar astronomy with either an ST80 or a 150mm Dob. Thing is, would it be better to use a Baader Solar filter across the full aperture of either or use the offset 50mm aperture built into the caps of these scopes. Is there any advantage/disadvantage either way apart from the cost involved?
  13. Asking £50 inc post to UK - or make me an offer In very near mint condition this PanaView eyepiece features a 5 element construction with giant, oversized eye lens elements. Ideal for low power, deep sky observing. It features an impressively wide 70 degree field of view. Eye relief of 24mm, ideal for spectacle wearers. Fully broadband multi coated with blackened lens edges and parfocal. Accepts 2 inch threaded filters. Soft twist up rubber eyecups for comfortable viewing. Finished in high gloss anodised aluminium with knurled rubber grips.
  14. COMPLETED - Withdrawn In very good condition. No marks or scratches. With endcaps – boxed. £30 FREEPOST TO UK
  15. NOW WITHDRAWN In very good condition. No marks or scratches. With endcaps – boxed. Features include two ED glass elements and fully multicoated edge-blackened optics for excellent colour, enhanced contrast, high light transmission and minimal ghosting. The six-element / four-group design minimises field curvature for a nice flat field, even when used with telescope f-ratios as fast as f5. Modern twist-up eyecup, 16mm eye relief and 21mm diameter eye-lens makes it comfortable to use, even when wearing eyeglasses. The tactile rubber grip and milled indentations make it easy to handle in the dark and the 1.25“ nosepiece includes a safety undercut so the eyepiece is less likely to slip out of the focuser. The 1.25” nosepiece is also threaded to accept 1.25“filters. Asking £34 inc post UK
  16. It's a Skyliner 200p. Would it not be easier to shift the secondary a few millimetres toward the primary instead?
  17. Just a quickie. After collimating a reflector and doing a star test by intra and extrafocus, I noticed what appears to be the shadow of the focuser intruding into the image. I've never noticed this befor and I'm not sure if it is correct or not. On re-focusing normally there seems to be no ill effect. I managed an easy split of a 6th mag pair with 1" separation, so clearly not too detrimental. Here is a visual mock-up of what I'm ranting about. Any opinions welcome, because collimation paranoia is bound to set in before long.
  18. Hi folks, I'm hoping someone out there has done this already, but I have a small reflector (Skywatcher Explorer 130/900) which is I think is seriously in need of collimating. Problem is the primary (which is spherical, btw) is not centre spotted. That in itself is not an issue but removing it from the tube just might be. My question is - do the retaining screws have nuts holding them in place on the inside or are they self-tapping? If the former, then how do you refasten the screws, without having to remove the secondary spider to allow one's arm to reach right down to the mirror end just to hold the nuts in place whilst the mirror is secured after spotting/cleaning???
  19. I need a heads-up on a Circle T Japan k.40mm eyepiece? I guess it's a Kellner, but anyone using them nowadays and if so, are they any good?
  20. Interested in a diagonal for my f/5 richest field refractor and am not sure of the issues with using a mirror vs prism diagonal. Some say that for fast scopes a mirror is best, while others say that faster than about f/7 though, the prism will induce spherochromatism. Does this apply more to a doublet (non apo) refractor, or is the difference negligible at relatively low power? I intend using the scope for comet patrol and ideally require orientation to be as per binocular view.
  21. Yep... I struck early on this. As was said, they don't come up that often.
  22. Neil English Chronicling the Golden Age of Astronomy A History of Visual Observing from Harriot to Moore Hardcover: 665 pages Publisher: Springer International Publishing AG; 1st ed. 2018 edition (13 Nov. 2018) Language: English ISBN-10: 3319977067 ISBN-13: 978-3319977065 Product Dimensions: 15.5 x 23.5 cm A personal review From the outset I should mention that this is a massive tour de force, some 665 pages, profusely illustrated throughout, covering the history of observational astronomy and perhaps more importantly the pioneer astronomers themselves. Whilst the chapters (all 41 of them) are laid out in chronological sequence for good reason, the sections can equally be read as standalone mini-biographies. The list includes some names that are familiar, from Galileo through to the Herschels, Charles Messier, Friedrich Bessel, Thomas Webb, John Dobson, democratiser of sidewalk astronomy in the 1960’s, and famously, the late Patrick Moore. There are many others who might not be so well known such as Clyde Tombaugh, the discoverer of Pluto. Will Hay, better known as a British comedy film actor of the 1930’s and 1940’s. George Alcock, comet and nova discoverer. David Levy, another of the great comet hunters. All did their finest work as amateurs, all totally dedicated to the pursuit of their hobby. The author, himself an enthusiastic amateur astronomer, has a way of making history come alive. He has written with passion something that is both unique in substance and enjoyable in style. It is crammed with “I didn’t know that” facts as well as a most studious and very thorough account of an area rarely, if ever, covered in such depth – that is, the great visual astronomers and their contributions to our understanding of the Universe. The often-used phrase “necessity is the mother of invention” becomes obvious as we learn how, incrementally, the optical telescope developed from a pre-Galilean spyglass to the unwieldy “arial “ refractor devices of the 17th century, some of which were literally hundreds of feet in length, to the development of lighter and easier to make mirrors rather than ever heavier and therefore more expensive lenses leading to the folded optics of the Newtonian type reflector, modern versions of which are still favored by today’s astronomers. Chapter by chapter the fascinating story unfolds, allowing us an insight into the ingenious ways that these pioneers dedicated their lives to the advancement of visual astronomy through trial and error, constantly struggling with sometimes huge financial cost and quite often with their health. This is their legacy, because when it comes down to it – the telescope is still the fundamental instrument of astronomy. It is the eye on the sky. The latter part of the book is often punctuated by the author’s own visual comparisons of some of the subjects under discussion - very useful for anyone wishing to see for themselves what the original discoverers were viewing. Where possible he uses telescopes of similar size and type thereby helping to accurately recreate some historic observations. Neil English used the phrase “Grand Amateurs” and I think that just about sums up this book. Highly recommended.
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