First shot of the sun is by Borg 45ED II at prime focus, 52mm IR pass filter on objective, APM Herschel Wedge and ND3, DMK 31AF03:-
Second shot is taken with 2x barlows added:-
IR pass filter removed, exposure reduced from 1/30s medium gain to 1/1241s and zero gain:-
ND3 removed to replace with Baader CaK, exposure is now 1/736s:-
- for some reason this clip is corrupted and lost.
2x barlows replaced by 5x powermate, exposure is now 1/77s:-
The result is pretty encouraging even at ~f/41.
Finally, c5 + baader visual film, prime focus, CaK, exposure 1/8s, medium gain... cloud rolled in, in the middle of the capture, only ~500 frames available and thus noisy:-
Baader visual film is too strong for CaK usage, even at f/10, it's far dimmer than my Borg 45ED II at f/41 with Herschel Wedge.
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