[Startrek (Martin)]

Im considering buying the ASI290MM USB3 ( not the mini ) as a guide-scope camera due to the smaller pixel size ( 2.9uM ) from that of my current ASI120MM-S ( 3.75uM) which would effectively bring my imaging/guiding image scale ratio from 1:4 down to 1:3 on my existing rig.
Comments from other forums suggest the 290MM is a more sensitive camera for guiding purposes and performs well up to imaging focal lengths of 1500mm

I welcome comments from folk who use this camera in their guide scopes with longer focal length imaging ( say 900mm to 1500mm fl )

Thanks