For those interested this is an amazing narrowband imaging scope..flat feild and light with good fov and I find it cools quick and holds focuss perfectly. Vixen have confirmed (via detailed analysis of spot diagrams etc) that it can be used with the HD Focal reducer x0.77 (not the flattener as its one is inbuilt) for a F ratio of F4.4 !! and will produce good stars on med sized chips (ASI183MM) of around 16mm diagonal or less.
Last edited by speedyjim; 17-09-2018 at 12:00 PM.
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