Due to my stupidity I purchased a O111 filter and when I went to put it into my filter/eyepiece box, lo and behold I already had one
.
I have absolutely no recollection of purchasing my previous filter at all
.
Therefore my stupidity is to someone else's advantage
.
FOR SALE: Baader 2" O111 filter in pristine condition (never used)
.
Price: $280.00 + postage
Bloody old age