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Product No.37222 Moon Glass ND 31.7mm (Catalog 1022 p.54)
 
Product No.37222 Moon Glass ND 31.7mm (Catalog 1022 p.54)
 

Product No.37222 Moon Glass ND 31.7mm (Catalog 1022 p.54) 

-Neutral density filter (ND4) for the bright moon
-Filter aperture 19mm dia.
-Threaded into the 31.7mm eyepircr barrel

Weight  :10g