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I'm going with the approach of tandem imaging.
mono on a 10inch F4 and rgb with an osc on a WO81 piggybacked on the main scope .
haven't decided on the osc yet but with what I have in mind, the image scale and fov are similar.
yet to try it. hopefully in a week or two.
I'm guiding with an oag on the 10inch so hopefully guide errors shouldn't be too pronounced on the wider refractor .
im using losmandy dovetails and custom machined rings to keep diff flexure to a minimum.
else imaging red first works as well.
Cheers
Alistair
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