Description: nice filter removed from High School laser lab. Used in laser R&D, this lens must stand laser power, so I guess it is prepared somehow for that task. It is 27x25mm and it says "50:10 BS" in the bag. Reflection is a very light purple (I could not take a pic of this effect), so I guess it is some kind of IR cut off filter.

Condition: GOOD shape. It has a little microscratch but nothing else.

OFFERS: feel free to send me offers.