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SyedT

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About SyedT

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  1. No worries Andy. Just as a note, I image at -10 degrees as it's a fairly low noise sensor, and never had any trouble cooling to -10 throughout the summer months.
  2. EFW2 comes with 9x1.25", 7x36 mm 5x50.8 mm or 5x2" https://www.atik-cameras.com/product/atik-efw2/
  3. Hi Andy, It's a mono sensor, EFW2 has a 9x1.25 inch carousel. The image above shows a 7x36 mm but that's not for sale as I don't have all the washers for it. Cheers
  4. Steve, if it ain't broke don't try to fix it! If you find that your narrowband images look reasonable then I'd leave the LP filter alone, unless you notice a significant degradation in your LRGB subs. I've not routinely heard of anyone having particularly better results with the filter in place, and it could potentially cause some issues with internal reflections; if you're not having this then I wouldn't adjust the setup. That said, it's hard to know what the difference will be unless you try it! I suppose I'm using the term lucky imaging liberally, hence the commas. It usually refers
  5. I wouldn't add any more glass into your imaging train; IMO the less material between the sensor and the scope the better for image quality. Most streetlights nowadays are LED which are broadband (as opposed to the old sodium vapour lights which could be filtered out), and so can't be blocked out as easily without having a knock on effect on your image quality. One way to tackle LP is using shorter subs, so-called "lucky imaging". It has the added benefit of requiring not-so-good guiding, and is exactly where CMOS cameras excel. I took the below from my back garden which is Bortle 5/6 facing to
  6. The secondary screws need to be firmly against the secondary, but not overtightened. If you leave them loose the mirror will flop around, and too tight it may in theory cause stars to be misshapen. Yes you can use the CCD, although the issue is that the data transfer with CCDs isn't usually fast enough for you to have a "live view", and using images to do collimation can be very tedious. I'd advise you to do it with a high-powered eyepiece if possible if you don't have a CMOS camera with a USB 3.0 port. Make sure you re-centre the star each time you make an adjustment or if it moves.
  7. Looks like a good start! The stars seem to have tails and are a bit triangular. Have you defocused and checked collimation is OK? This can cause the stars to have tails. Ensure that the secondary isn't too tightly held as anecdotally that can cause triangular stars. In terms of light-gathering ability, an f/5 system would be able to gather the same amount of light in 1/4 of the time as an f/10 system, so I imagine it would take at least 4x as long. You have to factor other things in e.g. specific sky conditions on the night of imaging. I wouldn't worry too much about equivalence as the re
  8. Update: My QHY268M's cooling board broke down randomly. Contacted QHY via Bernard at Modern Astronomy, and he did a wonderful job of securing a new camera for me as it's still well within warranty. As it's now galaxy season, I've hooked up the 268M to my Edge HD 8. I initially thought of using it with the 0.7x reducer, but it wasn't quite compatible with my setup in terms of significant vignetting and oddly shaped stars (likely due to tilt caused by the extra length that comes with the reducer). I was also having a nightmare with collimation with the reducer, not so much now. Stars aren't
  9. Update: My QHY268M's cooling board broke down randomly. Contacted QHY via Bernard at Modern Astronomy, and he did a wonderful job of securing a new camera for me as it's still well within warranty. As it's now galaxy season, I've hooked up the 268M to my Edge HD 8. I initially thought of using it with the 0.7x reducer, but it wasn't quite compatible with my setup in terms of significant vignetting and oddly shaped stars (likely due to tilt caused by the extra length that comes with the reducer). I was also having a nightmare with collimation with the reducer, not so much now. Stars aren't
  10. It really is an excellent camera!
  11. You should claim copyright
  12. OAG sold. 490EX & EFW2 still available!
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