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Midnight_lightning

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About Midnight_lightning

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    Star Forming

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    York

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  1. I just installed a set of filter centering masks from Buckeyestargazer and am so impressed with the masks and the service received from Joel at Buckeye that I feel a review is in order. I recently purchased a QHY filter wheel and 50mm Chroma filters and installed the filters using the QHY screw and washer system. This led to a number of concerns: these are expensive filters to trust to the QHY screw and washer mounting system. Whilst the washers held the filters in place, and there was no evidence they were going to fall out, I didn't have confidence in that solution. When I had to
  2. I have been trying to get a Riccardi M82 0.75 reducer to play nicely with my CFF 135mm refractor, Full Frame CMOS camera and Chroma 50mm filters for several months and have adjusted spacing down to what seems to be optimum, finally using 0.10mm steps. This graph shows convergence of center and corner focus at 77.94mm spacing which is not far off the theoretical value when the 3mm thick filters are taken into account. I can get almost round stars in the corners with some wavelengths(filters) but others are disappointingly elongated. The main issue however is reflections in Lum
  3. Sorry chaps, a bit of a howler . a panel pin I was using to hold paper over my light panel must have come loose and dropped into the dew shield and ended up leant against the objective lens. Removed panel pin and lines have gone. at least it’s resolved
  4. 135mm Refractor and Riccardi M82 0.75 reducer. I will strip it down today and check the optical path.
  5. Does anyone have any thoughts as to what is going on here? I have been having trouble with reflections on bright stars (Lum/Blue) and on advice reversed the orientation of my Chroma filters. This significantly reduced the reflection but I then have these lines through bright stars on all filters, including 3nm NB.
  6. Thanks, all look good. Think I will get one of the ECoAir DD1's
  7. I am close to completing an observatory in my garage that will measure 8'x8'x6' and would like a dehumidifier to keep everything dry. The Obsy will be well sealed and the garage is well ventilated so it shouldn't need anything very powerful. I am looking for something that will work at low temperatures (from around 1C to 5C) and be cheap to run. I have seen various small desiccant ones advertised that sound ideal but they have very mixed reviews. Be great to hear from anyone that has one that works.
  8. I’m looking for a sturdy Pier for an EQ6R with a heavy 135mm refractor on it. ideally something like the Astro-Engineering one with fins running top to bottom. Will also need the EQ6R adapter, although I can get this separately.
  9. This is in as new condition, I purchased it for use with an Esprit Pro 80 and Nikon DSLR but it is suitable for use in many situations Originally purchased from FLO who state on their site "The Japanese-made IDAS D1 LPS is in our opinion the BEST Light Pollution Suppression filter for astro photography with DSLR, colour and mono CCD cameras. " https://www.firstlightoptics.com/light-pollution-reduction/idas-d1-light-pollution-suppression-filter.html The filter is in as new condition, I only used the DSLR camera briefly so it has had very little use during which time it was safely
  10. This is in as new condition, I purchased it for an Esprit Pro 80 but it is designed for any scope around that size. It has two legs and just sits on the front of the scope when in use. Collection by arrangement, postage at cost. £10
  11. The OAG is the one shown here https://www.sxccd.com/sx-usb-filter-wheel The condition is excellent. There are no threads, it connects directly to the SX EFW with screws on one side and with various adapters on the other side - typically T M42 or M48. This one comes with the M48 female connector but others are widely available at a modest price. It is much better in my opinion than the QHY one I just bought because you can adjust the mirror height externally without removing the camera. Collection by arrangement, postage at cost. £95
  12. Hi Dave, apologies for the slow reply, just seen your message. The OAG is the one shown here https://www.sxccd.com/sx-usb-filter-wheel There are no threads, it connects directly to the SX EFW with screws on one side and with various adapters on the other side - typically T M42 or M48 Its much better than the QHY one I just bought because you can adjust the mirror height externally without removing the camera. Hope this helps. Jon
  13. Narrow Band Filters also sold. Remaining items are: Bahtinov Mask - Perfect for Esprit 80 and similar sized Refractors SX OAG Autofocuser Bracket and Adapter for a Sharp Sky focuser to fit on Esprit 80 (Just the adapter and bracket)
  14. Just looking at the remaining items and I think the SX814 was over-priced so I have reduced this to £999 (Cost over £2200 new). This is a superb camera in new condition, supplied in its original case. (a bargain at less than half-price). The CCD chip (Sony ICX814ALG EXview) has high QE and very low noise - Darks are not necessary with this camera. Hardware binning (1x1, 2x2, 4x4) is built in and easy to use. It is a high resolution camera with a pixel size of 3.69um making it suitable for a wide range of telescopes including fast short focus scopes and Hyper-star systems.
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