Paul - Here are some examples of using DSS on simple fixed tripod for M45:IMAGE LINK: https://photography-on-the.net …p?p=11117775#post11117775
More details in each linked thread.
Taken Oct 17, 2010, 500 (2) sec exposures @ ISO800, 40 darks, 25 bias, shot via T1i+50mm f1.4 prime lens on tripod.
DSS took quite a while to crunch this.
9f Orion/M42 via T1i/50mm lens/DSS
Taken Oct 19, 2010 5:30am - 5:56am EDT, 256 (5) sec exposures (21.3 min total exposure time) @ ISO800, 33 darks, 25 bias, shot via T1i + Canon 15-85 Lens @ 85mm, f5.6 on tripod. 9g Orion/M42 via T1i/DSS @ 85mmIMAGE LINK: https://photography-on-the.net …p?p=11137109#post11137109
Since I've taken this I have the 70-200 L f2.8 IS II, I'd be curious how that does at 70mm wide open at f2.8...if it's clear tomorrow morning I should try that.