Quote:
Originally Posted by PvtPublic
I believe UHC-E filters are for smaller scopes but why is this so?
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If you have a look at the spectrum graph, the UHC-E filter has slightly wider bandwidth to about 520nm. Wider bandwidth would make viewing brighter (but less contrasty) which is why I guess they recommend them for "small" scopes.
F/ratio of the scope may be more relevant than size though. A fast scope like F5 would probably handle the darker UHC better regardless of aperture and slow scopes like F10 may be better with the E version.
I don't actually own these particular filters so just going by how my other filters work.