Quote:
Originally Posted by N1
Another great set Marc.
Be interesting to see what the 178 yields. I'm weighing up a few options myself for doing our sister planet a bit more justice.
|
Thanks
It does have a much better QE between 300 and 400nm ~40 to 60%. You have to take the AR window off again. I saw a UV shot on the same night taken with a C14 and the details blew my socks off.
Quote:
Originally Posted by N1
I read about the aperture thing too and I think that must have more to do with the shorter exposure times you'd be getting from a bigger objective rather than greater resolution. Meaning if you get good seeing (not easy for UV), you could compansate to some large extent, as you could with even more sensitivity in UV. 8.5" ain't too bad for an 18 arcsec object whose angular size will basically double by late November while still presenting enough sunlit surface for clouds to be seen. Also, UV should increase your instrument's resolution thanks to the shorter wavelengths. IR does the opposite.
|
True but the SNR is so much easier to reach with a a bigger aperture. The flux is just not there with 8.5". Too hard yakka that's why I've already been looking into getting a larger mirror. I'll see what the 178MM brings up. They're on back order. I have no idea what availability and delivery times are right now.