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Dannae

Members
  • Content Count

    159
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  • Last visited

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92 Excellent

About Dannae

  • Rank
    Star Forming

Profile Information

  • Gender
    Male
  • Interests
    Anything 'Space-y', large dobsonians, stained and fused glass, jewellery making, Humanism, M.R.James, Lotro, anything to do with cats, overcoming shyness online and in real life.
  • Location
    Worcestershire, UK
  1. Hi John, I love reading first lights and this really was one of the best. I think it is because they remind me of my own first lights and the emotion you feel when all the expectations and no small guilt of spending good money comes to fruition. I have to echo your thoughts that often you wish you had gone larger I think that may be the most common of thoughts! Good luck with your new scope and keep the reports coming. Regards Dannae
  2. Hello and welcome from me too Regards Dannae
  3. Hi Len and welcome from me too Regards Dannae
  4. I used to have a set of these and now wish I had sold my internal organs instead ! Back in the old days when the toucam ruled they were superior used in eyepiece projection compared with barlowing the camera. I saw albedo effects on Ganymede visually with these coupled with an omc 200 on an exceptional night at kielder. Someone with deep pockets is in for eye candy. Regards Dannae
  5. Hi Niall, I am obviously very biased but my obsession with obsession goes back a long way! The 15" was my first large dob, the largest scope I had at that stage was a 10" Meade reflector. I loved that scope and I bet I couldn't pry it out of your hands for any money I spent time in the U.S. and it was there that I discovered truly dark skies and what large aperture can do. I bought myself the 20" f5 around 7 years ago when I came back to the UK and that really was a beast though the skies didn't do it justice. Up until the recent trend in thinner, lighter, faster mirrors and the evolution out of the box that Dave Kriege incidentally popularised to the amateur telescope maker back in the mid eighties, they were pretty high up there amongst manufacturers. The obsession classic moves like a dream, the finish is good, and it just works beautifully. Fast forward many years and better finishes, components and options now exist from companies like teeters, waiters and websters who have taken the ball and run with it leaving obsession as it has always been. For example with every scope (untested - the mirror comes separately and never meets the mirror box until you put it in yourself) you have to centre dot your own primary, fit your secondary mirror and heater from a kit, drill and fit many parts of the servocat yourself, trim the truss poles to get to focus and basically do a few fittings that many others now offer as standard. I was happy and capable enough, if not a bit worried!, about doing this but considering the cost it would be something people might take for granted would already have done. Even the fan hardware blowing on the back of the mirror had no connector for a battery, just bare wires ( no big deal). I helped a friend set up his 18" uc and fit the DSC and servocat and while it fitted its remit as an ultra portable scope, it definitely wasn't ultra light, Galaxy and Omi torus still use full thickness 2" mirrors to help with balance issues. The three strut truss I found not quite up to the job personally and I had to chase collimation all night when moving in alt. the 15 I had a go on was fine and the 22 I played with in the Isle of Wight I think at a star party there uses 4 struts connections which solves the problem. There was also a design fault with the flimsy plastic mirror cover if I recall when the connecting rod bracing the alt bearings was in place and the lid wouldn't fit over the mirror. I'm being super super critical of things and admit I am a perfectionist. I was and am immensely proud and privileged to have owned an obsession scope and I highly recommend the classic range if you don't mind getting involved finishing things off yourself and have time to allow for cool down. A looked after second hand obsession classic in the uk is a no brainer:) I can't recommend the 18 uc for the two days I used it, and can recommend the 15 and 22 uc if portability and transport is the overriding concern. My own personal opinion is that if you want everything done for you in the highest quality with the most modern advances (boundary layer fans, flocking, internal truss wiring, active counterweight system etc) and tested to the highest levels in a time scale that doesn't run into years then choose a teeters with a Zambuto/ light holder mirror. In the EU I would choose skyvision with their own mirror or wait a little longer and get a Dobson factory with nichol or mirrorsphere like mine. I would like to compare a Sumerian Canopus but have yet to see one in the flesh but it gives me the feeling of being everything everyone says it is. Just my 2 mega parsecs Regards Dannae
  6. You are most welcome Derek. Pierre makes some wonderfully light 10 and 12" travel dobs too, though he makes whatever you want in whatever size. I normally binoview on high surface brightness objects like globs, clusters and solar system objects so I needed a more robust upper tube assembly otherwise I would have gone for one of these and saved another few kg. There is roughly a 12 month lead time and I expect mine in early spring. Mirrorsphere the company that makes mirrors for French observatory telescopes have a very high reputation for the smoothness of their mirrors and I wanted the highest contrast I could get. They also are very close to his workshop so he picks them up and star tests them before despatch. This is the highest quality dobsonian build I have seen of this type using wood on this side of the pond, websters and teeters are the two I would recommend from the U.S. If you want more bells and whistles but you will pay the import tax for the pleasure of owning one of these. Regards Dannae
  7. Hi Derek, There has been a lot of good advice posted here already. I have experience of obsession 15'' 20" and 18 uc, a teeters 16"' a star master 18" and more than a few meade star masters over the years. I am currently having an artisan scope made (Pierre desvaux at the Dobson factory) with tracking platform from France with a 14" f4.5 mirrorsphere mirror as this is the size I am now comfortable to live my life with (13kg including mirror). I finished the ngc catalog a few years back and time is precious now for me so I have opted for high quality at all levels and components effectively created an heirloom for me. His blog is wonderful from his website and he posts pictures of every build. He has accommodated every wish for me. The euro is pretty good at the moment and I was tempted by a larger skyvision (also French) but loved the wood too much and the craftsmanship of the Dobson factory scopes to pass. I have never had the pleasure of seeing a Sumerian but apart from one bad experience here with an Altaid I have heard nothing but good about the scopes. I also have heard only great things about John Nichols mirrors. I had a wonderful f20 mak from OO that I supercharged with a few obvious mechanical replacements but felt the few hours I spent with them had little to do with my aspirations and needs and I never felt comfortable dealing with them. The scope eventually exceeded my expectations and their mirrors are their strongest suit. I wish you patience in choosing and patience in waiting for it to arrive and hope to catch up with you and all these light bucket nutters at some stage. Regards Dannae
  8. This is always an interesting topic, one that likely has no one answer that will satisfy all people. My own opinion is that increased smoothness of the mirror surface reduces scatter and thereby increases contrast on those targets that benefit from it (doubles, lunar, planetary, etc), it is however only one part of a myriad of factors, some outlined above. A larger mirror with a rougher surface may show you fainter objects and it depends on what objects you are viewing as to whether it is an improvement over the smaller smoother mirror e.g diffuse nebulae. If you are talking purely numbers then anything above diffraction limited will suffice for the majority of nights in the UK for deep sky objects. For longer focal length planetary reflectors then I recommend getting the best you can afford, and wait for those rare and exceptional nights of transparency and seeing. Regards Dannae
  9. Hi Hal, glad you are now obsessed I had a galaxy mirror in my 20" f5 and it was a beauty. I wish you many good nights x Regards Dannae
  10. Hi Ian and welcome from me too Regards Dannae
  11. Hi, I would have a look at these light pollution maps of the UK: http://www.avex-asso.org/dossiers/pl/uk/index.html Click to zoom in http://www.avex-asso.org/dossiers/wordpress/?page_id=127 Predominantly parts of Devon and Cornwall, central and northern Wales, Pennines, Northumberland and Cumbria, North Yorkshire, Southern Uplands and the Highlands. Regards Dannae
  12. Dannae

    Hello world!

    Hi Rob and welcome Regards Dannae
  13. Lol bigsumorian, my Sphinx also came from oo with an omc200 Regards Dannae
  14. Hi Jon, I have the Sphinx with Hal tripod and it is an excellent visual mount. It carries my grab and go TV-76 with ease. I can't recall the size of the thread for the tripod but it may be m8 and fits inside my tele optic giro also (Whatever that is). I have the pier extension which I find essential for a refractor and also the table top tripod which is great for setting up on benches at family get togethers. You will need some ruby lith plastic to cover the overly bright screen to protect your night vision, I got mine from widescreen I think. Hope this helps Dannae
  15. Hi Tim and welcome to sgl. Many happy returns from me too Regards Dannae
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