Baader 3.8 filter ready to be used and we got sunshine! The first shot is taken with my Ranger at prime focus, with my DIY reducer. I've to stack a blue filter with a green filter in order to be properly exposed.
Higher power imaging is why I'm going for 3.8 filter, so I pulled out my 5x Powermate to take the following shot, only a green filter is used:
They are from AR1416, exposure was 1/60s with zero gain. I'd say Baader 3.8 is really superb for that purpose, I'd definitely want even faster exposure! It seems like if I were doing that with my 127mm Maksutov at f/23.6, I will be getting 3000mm focal length. That should yield faster shutter than this setup which is 2400mm focal length at f/34.3.
Encouraged, I'll see if I have chance to test the 127mm Maksutov with planets tonight, if it's proven with good quality, I'm going to make a 3.8 Baader for the Maksutov as well!
Finally, since my Canon 100-400mm f5.6L also has 77mm thread just like my Ranger, so I've moved that Baader 3.8 there to have a shot with my Canon 450D: