South Park Free Episodes Capital

Polarizer Filter with variable tramittanza 1-40%

Tecnosky I bought this filter, so that you can use both, as a filter as a single variable, on the moon (as with the 12 "is very bright) and the bright planet Venus (in order to make their observation dynamic) ...
Operation is simple: two filters to be screwed by a nut on each other and turn one of the two filters, thus changing the total transmission, so it's so easy to use.
is not one of those accessories that are "must" be present in case of an amateur as a UHC or OIII (or a collimator for the spotlight), but its use is very subjective.