Quote:
Originally Posted by raymo
First suggestion Mick; DSLRs are not the first choice for lunar work because
they suffer from vibrations from the shutter and mirror, causing slight
blurring of the image. You can minimise this by using an ISO of 1600
or so, and a much higher shutter speed. As an example for a half moon
ISO 1000 or 1600 and a shutter speed around 1/3200 to 1/4000. The
exposure is over and done with before the vibrations really get going.
Obviously you would have to use slower shutter speeds for a sliver of moon
such as you had, probably 1/250 to 1/500 range.
Even a sliver of moon should be bright enough in Live View to enable you
to get spot on focus. When focusing on objects that are too faint to show up
on Live View, slew to a bright object, focus on it and lock the focuser, and
slew back to your target.
raymo
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Hi Raymo
Appreciate the tips. I'll them a give a go next time out. I tired using a parfocal ring last night but still seemed a little off. When I ordered the scope I asked for a 2-speed focusser and the store is going to send me one to swap out. I hope it's better than the single speed that came with the scop - it is really hard to lock the focus without it moving a bit as you tighten the thumb screw.
Thanks
Mick