Sounds like those 3mm thick Hoya 1As with front threads are made for you.
Moose
julian_davies@xxxxxxxxxxxxxx wrote:
Maybe true for single filters, but I am firmly in the 1A permanent brigade, so
I need:
-Threads on the front to screw hoods into (minimum)
-Sufficient thinness to allow other filter(s) in front, then threads for the
hoods
-No step - up rings, so the hoods fit.
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