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  1. I am a little unclear on where the 17.5 mm backspace on the cooled cameras starts. I have a filter draw screwed straight to the threads on the camera. If I use my micrometer and measure from the bottom of these threads down the side of the camera body that would suggest the sensor is deep inside the housing near the desiccant tube. Or does the 17.5 mm go from the top of the m42:m42 ring that is commonly screwed to the camera flange? ZWO cameras calculate their 17.5 mm from the top of the m42:m42 extension tube while I don't seem to have a similar ring on my Altair camera. The ring on top of th
  2. https://www.bbc.co.uk/news/business-55734277 Interesting article from the BBC on the subject..
  3. Normally trade deals are meant to make things easier. Yesterday I had a European vendor decline my order. I somehow think this is the new normal.
  4. I think we are seeing a fundamental shift in technology, we saw it with the shift from film to digital, in audio with analog to digital and in many other fields the technology evolves and the knowledge and skills we have developed and prized are superseded. I have recently purchased a 26c and compared to my ZWO 294 the advance in technology is amazing. I have little doubt that by the end of 2021 my 26c will be 'old' technology. Many years ago I met one of the Kodak film gurus who explained that we had seen nothing yet and that advances in film technology would blow my socks off by the year 2
  5. another signature added ... street lights also have an adverse effect on migratory birds and is not good for wildlife. Ross
  6. Wyvern I have printed your design off, rather nice. Awaiting the geared NEMA11 motor but that should be here soon. I have fitted a small EL panel (12volts) inside the lenscap and that seems to have the benefit of making a better cap for darks and also the capacity to take lights. I am flashing up an uno R3 for the code but I am having trouble reading your photo/schematic. I can see from the code that pins 2 is direction, pin 3 step there is a 3rd wire... is that the ground? or what pin on the UNO should it go to.. Thanks Ross ps seems to go to the enable pin on the stepper controller?
  7. STL files for 3d printing ... oops they are not an allowed file type... I can't upload them.. happy to email them to any one who wants them. Sorry Ross
  8. @wyvern Hi I am printing your files up after having converted them to .stl from the fusion 360 format. Would you mind if I posted them up here on your thread? Hope to get the lens cap built this weekend. Thanks Ross
  9. This sensor is APS-C size which is a common format in DSLR cameras and if you have been using a DSLR on your telescope it may be a logical progression. This chip is so much better than the zwo 294 and other cameras I have used in that it has a fantastic dynamic range, deep wells and is a true 16 bit. When you image with it the difference is instantly visible. The raw subs actually look very good. Add the absence of amp glow and noise and the results are just so easy to process. I am not a very experienced imager, that was my first image on that camera and that image has had minimal stretch or
  10. Bottom line is that I like the camera. Compared to my ZWO 294, a quantum leap. Here is my first light image of the Horsehead Nebula B33. I had to crop it as my ED72 / flattener seemed to have some issues with the big chip. Strange little diffraction rings on the edges. I have moved up from T2 to M48 extensions but clearly, my back space will need a little more work as well. The first thing I noticed is that the image comes out of APP with great dynamic range and requiring minimal additional stretching or saturation boost. The very low noise also means those two green pixels per red and blue ar
  11. Feock


    Does any one know what the unity gain number is for the 26c ... just setting up for my first night of imaging.. no previous experience with Altair cameras. Ross
  12. Hi, I built an outside pier before building my main observatory. I wanted an observatory in a box. I simply dug a rather big hole of nearly 2 cubic meters and filled it with concrete and broken tiles that I had on hand and then bolted a very substantial pier on top. All my power and control cables are moused through some substantial buried water pipe. On top of the pier, I built a super lightweight box made from 25mm kingspan foil-backed insulation covered with a single layer of fibreglass matt and resin. The box is super strong and near airtight. I leave a small dehumidifier running in the b
  13. I have 2 ZWO eaf's and they really are very good, for the money. But they are not perfect and do develop backlash issues over time. Nina and some of the other focusers can deal with this very well. I have a few different telescopes for different targets and I prefer to have a dedicated focuser for each scope. Gina made the comment about building your own focusers and it is my preferred approach. The motor in the EAF must be tiny and it does struggle on larger payloads. I have made 4 focusers now using the NEMA 14 & 17 motors and Arduino UNO. It is amazingly cheap to build a very powerf
  14. Feock


    Has anyone had a play with the new Altair 26c camera? I think they may be due in this week. Specs look great. Ross
  15. Thanks for the comments ... I have splashed the cash and expect to get the unit Friday. It is going to allow me to completely remote my observatory with all the safety switches. Fingers crossed. Ross
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