SKYMAK
24-08-2008, 02:58 PM
this filter beats any thing else..polished to zeiss standards,screws on to the jena eyepieces on top,,you unscrew the ring on top of the eyepiece and replace with the mars glass ,normal filters don't stand a chance up against this one.not to mention how rare it is to find one..try it, you will see..$45 including postage to australia