Re: Tracking w/ Passil 4 polar alignment
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And for FWIW, I have a big, heavy/1.5kg+ (and sharp!) Nikkor 80-400mm AF-S ED zoom lens and if I want to try to image the sky with it, I have to add a Losmandy DVR108 Guide Scope ring to the plate, near the front end of the lens to keep it rigid and stable. The thing will sag/flex/shift quite a bit under its own weight when mounted on it's integral tripod shoe. I assume there are a lot of floating parts inside of that big zoom lens, fighting gravity. If I am using two or more cams on a long plate, I have the telephoto set up rigidly with a secondary lens support and the cams with shorter lenses go on ball heads on the plate. Most ball-heads have a lot of flex so I only put 58mm or shorter lenses on them. My favorite lenses for the second and third cams are 20mm ultra-wide and a 10mm fisheye.
I hope this helps.
On Tue, Jul 21, 2020 at 8:27 AM uncarollo2 <chris1011@...> via groups.io <email@example.com> wrote: