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Hi Leon
Good seeing and a good optical system (smooth, collimated, etc.) can help stop the brighter stars bloating and drowning E & F. With poor seeing, E & F tend to get drowned by A & C.
My overall focal length was 2160mm x2.5 = 5400mm and that helps put distance between each stellar component.
Webcam = good as you can stack silly numbers of frames whilst keeping exposures short, to take advantage of moments of excellent seeing.
Precise focusing is important. I found that very short stabs on my (new) motorised Moonlite focuser button got me to best focus.
With good seeing (7/10 or better) you also benefit from having Orion over 50 degrees altitude. Oh, and a spot of luck is required too!
However, having said all of that, Ken with a much less sophisticated system, easily grabbed G & H, so it’s worth trying and modifying your approach based upon the results you get. I’m still blown away with what Ken achieved with the relatively lowly ToUcam and a non-tracking dob; the man’s a star!
Definitely have a go; it is a real challenge and enormous fun!
Cheers
Dennis
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