California Nebula Home › Forums › Imaging › California Nebula This topic contains 0 replies, has 1 voice, and was last updated by Ian Smith 4 years, 5 months ago. Viewing 1 post (of 1 total) Author Posts December 11, 2014 at 9:10 am #1178 Ian Smith Participant I have used a modded 60D with a 200mm f2.8 lens @ f 3.5. on an Astrotrac. 16×20 subs with 6 darks processed in Images Plus with PS6. A Friday evening in the back garden with Martin ASinton. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.