Quote:
Originally Posted by lazjen
I can't comment on the actual camera, but I used to use a ST-i colour for my oag before switching to a mono ASI174 - it worked ok, but of course the mono works a heap better.
I'd be willing to bet that even your colour ASI120 would do an ok job for the OAG in most situations.
As for the OAG improving things - it will depend. What problems are you having now?
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To be honest, I'm not really having problems, I can guide for 10 minutes and still sit under a 1 pixel variation on PHD2.......but I have a single 'issue' in my head that keeps coming back to plague me.
The issue - I run a guidescope that is approx. 1/4 of my focal length. Pixel size on my guidecam is about equal to the image cam......so in my head that says that every guide error I get is multiplied by a factor of 4 on my image cam. Yep, I understand about sub pixel guiding and all the rest but at the end of the day there will always be that factor of 4 thing there.
A simple way to remove that factor of 4 thing is to use an OAG.
Will it make a difference? Possibly....investigating that 'possibly' thing is worthwhile to me.
Also, the secondary benefit I'll get is saving approx. 600g of weight on a setup that is probably a little heavy already.
If it all goes to crap and causes me issues I can easily swap back to a guidescope so I'm not too fussed. I'm setting up a second scope in the ob's so needed another guidecam anyway.