Just wondering if anyone has purchased one of these yet for imaging. There seems to be some favourable reports and images on some of the UK sites. Seems a Baader MPCC or similar is a given for this focal ratio.
I was doing a quick comparison, and in terms of my ED120 which is f7.5, would be 3.5x quicker exposure.........for a very similar focal length 800mm versus 900mm. Downside is a lot more fiddling. With the ED120 or ED80, it is just plug and play, whereas at F4, I imagine collimation would be a bit finicky.
Very tempting..... might do a bit more research!!
Cheers,
Daniel