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Found 7 results

  1. Hi, sorry if this was already posted, i'm looking for a flattener/reducer for my William Optics Zenithstar 66 SD (already asked WO by email) they reply me that since this product is discontinued over 10 years ago, i need to look for FlatII, FlatIII - with 2"sct thread Flat6a with 2"SCT adapter and i saw this one https://www.firstlightoptics.com/reducersflatteners/william-optics-adjustable-flat6a-iii-08x-reducer-flattener.html and this one https://www.aliexpress.com/item/32917167365.html but i'm not very sure, so i'll ask before buying anything i will use it on my recently buyed star adventurer classic (buyed on FLO) Thanks in advance
  2. I've just fitted a 2" IDAS-D2 filter into the William Optics Flat61a flattener following on-line instructions. It strikes me as odd that the filter is installed with the front of the filter facing the camera sensor rather than the 'sky', I'm assuming this is correct and shouldn't cause any reflection issues? For info, I've attached a couple of daylight images of the filter in 'action' on a colour calibration chart showing the natural colour cast The image above, without the filter fitted, is colour profiled in LR and white balanced using the middle grey colour patch The image above, with the filter fitted, uses the colour profile of the first image and the white balance is also from the first image The last image below was colour balanced using the middle grey colour patch in LR and clearly failed lol Assessing the grey colour patch there is no red in it at all so obviously the calibration would fail. It will be interesting to see it working under normal conditions photographing the night sky
  3. Hello, I own a Vixen ED-80 refractor which is used with a custom focuser by Telescope Service. (pictured below) A Celestron f/6 SCT reducer corrector did not provide decent images either because it is not appropriate or because I did not maintain the correct distance. I am thinking of buying the Sky-Watcher .85x Reducer/Flattener instead, as it is made for similar ED80 telescopes. I do not know what is the correct distance of the SkyWatcher reducer for my setup and more important, I do not know if it will focus with the custom TS focuser. Do you have any similar setup that you have used successfully? Clear Skies! Paul
  4. I have some problem with my old setup with a fullframe camera and vignetting. My telescope is a TS130 f/7 APO and the camera is a Canon EOS 6D. Parts of the vignetting comes from the camera house itself and that is something I can't do anything about for the moment. But my flattener with 2.5" and x0.75 is a little bit narrow and now I replacing it with a 3" x1 flattener. I'm not sure how much DIY this will end up with, but as usual I think it will be a lot :-) My earlier flattener was a high quality Riccardi M68, the new one is an Altair Planostar 3", not very much written and tested about this one but I think it's good. As usual I have tried to document what I do on my homepage if you find it interesting to follow: http://astrofriend.eu/astronomy/projects/project-three-inch-flattener/project-three-inch-flattener.html Now I must decide if I shall build it with an off-axis guding or a guide telescope, or maybe no guiding at all, instead a high precision mount. /Lars
  5. Well look what the postman just delivered As I'm at work and the photo booth's in my office I thought I'd send some images of my new gadget .. I meant to buy this when I bought my APM early this year but I already had the Tele Vue TRF 2008, Markus Ludes of APM said it would work a treat with the EX428 being that its got a small chip so I delayed (very true so thanks Markus) , I actually found the little 428 didn't need a flattener at all with the APM 107 combo and the F/6.5 is reasonably fast as it is. Ive now got another 314L and its similar to the 428 in taht it also doesn't need a flattener so why did I bother? Well I am going to dabble again with OSC and I have my eyes set on a QHY8L as my next camera, I just loved the OSC work flow although hated the Moon and poor seeing which really punishes Colour CCD's/CMOS's. I really am looking forward to the f/4.87 speed , its going to come in handy for both the super sensitive ATIK 314 & later the large chipped QHY8 and my 40D which I will be testing it on over the next few weeks.. This image shows the 45mm aperture which will easily cover a DSLR chip... At over half a kilo its no flyweight
  6. Hi Everyone, need a little help choosing the right flattener/reducer for the William Optics Zenithstar73. I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener! So I was wondering if I could get away with the Flat6 0.8 reducer which does say it works on scopes 70 - 80mm f/6 but doesn't list the ZS73 in the models list or do I need to spend the extra and get the Flat6A11? Can anyone shed some light on this have email 365 where I have seen the Flat6 but had no reply. Thanks in advance.
  7. I think this was intended for use with the Megrez 72, Z70, Megrez 80, Megrez 102 and FLT110. I used it with a Megrez 72 but I no longer have that scope so this is surplus now. In excellent condition with caps but no box. Selling for £95 including postage. Payment via Paypal (you pay fee or send as gift) or bank transfer.
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