I understand the concept of a reducer/flattener but not the finer operational nuances of them. So, a question for those with more understanding of these things.....I recently bought an SVBony 80mm/f7 refractor, the reducer/flattener they make for it is only available from their Chinese/US stores, not the Oz store. However, they have one here marked for the 102mm refractor, which is sold here, but their advertising says "
Designed for use with refractors with focal lengths of 400mm to 660mm and focal ratios of f/5 to f/7.5".
Does that mean it WILL work satisfactorily with my 'scope?
If so, why would they market another one that is marked for the 80mm? There is a significant price difference between them too, the 80mm being dearer.