Ive been trying out further FR and FF from different manufacturers on my 127mm scope to see exactly which will give me a perfect flat field with sharp stars. After testing about 7 different ones I have settled on the P-Flat IV from William Optics. Nice but expensive bit of kit.
So after testing there were a few sucker holes around and so I decided to see what I could get to the North of my site. I managed to get 7x5 min with the QHY10 - PFlat IV and 127 mm scope before the clouds cleared me out.
I reduced it to monochrome as the colour was terrible due to moon and light pollution in such a low number of subs. In hindsight I would have been better off binning the camera 2x2 but that didn't occur to me at the time. Reminds me of a sad face; no flats, bias or darks.
Comments welcomed
Last edited by allan gould; 20-03-2012 at 05:49 PM.
Thanks Alpal, but I posted this image so that owners of this scope could see a viable option for a FR/FF that actually works and gives pinpoint stars to the very corners without a great deal of vignetting. It really isn't a "pretty" picture but a working image to evaluate the success of the optics. In that I'm satisfied. With our current weather conditions it will take a long while before we have a good clear run for any imaging.
but I posted this image so that owners of this scope could see a viable option for a FR/FF that actually works and gives pinpoint stars to the very corners without a great deal of vignetting..
Allan, I agree that it looks very promising. Which 127 mm scope is it?
It's the fore-runner to the Meade f7.5 127mm triplette with Japanese glass that I purchased from MyAstroShop. Steve Massey imported two scopes for evaluation and I snapped up the second one while he took the other.
