Quote:
Originally Posted by mercedes_sl1970
Just curious about what minimum size scope/bino these could be used with? Eg. 100mm BT45 binos or 80mm refractor?
Thanks
Andrew
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Mechanically: These filters act like any other - they just screw into the base of the eyepiece you choose to use - or barlow - or extension tube using the standard thread.
Optically: I'm not sure that's an easy one to answer. The smallest aperture scope I've used these on is my 200mm f/5 reflector. Given that they should should only effectively block light from a specific part of the spectrum I can't see why they'd restrict it across the rest at all - making their use on smaller scopes a "darker" experience....
Anyone?