Quote:
Originally Posted by alistairsam
Hi,
Nice image.
which camera was it?
I'd suggest checking the collimation as I think it needs a minor tweak.
there is a method for collimating RC's using the secondary edge.
you can use a normal cheshire as well.
do work out the image scale of the guide combo vs the main scope and see if its not too far off.
phd uses sub pixel guiding, but seeing will be a major factor.
OAG would be the way to go but the guide cam will need to be very sensitive as the aperture of the main scope is not that large, so is the pixel on the qhy5l2.
with the rc8, an oag and lodestar is a proven solution as the lodestar has larger pixels than the L2.
Look forward to more results.
Cheers
Alistair
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It's using my Atik 314L+.
I was thinking I'd end up with an OAG but I thought I'd see how the mini guide scope and 5LII would go first. I think going OAG would mean getting a new guiding camera so I'm trying to hold off for a bit as I'm in the process of trying to sell a property I own and if that works out then I'll look at a major equipment upgrade.
The results from last night are promising with my existing setup especially if the comet-shaped stars are a fixable collimation issue. As I said that was my first go at collimating so I'm sure there's room for improvement!
I've attached a screengrab of a defocused star and it does look a little bit off centre?
Thanks for the advice
