(Discontinued) ZWO New Narrowband 31mm Filter

Available from Cloudbreak Optics when we last checked. Sold from the shop’s own store; the price there is the one that counts.

This product has been discontinued by ZWO. We are selling remaining stock until we are out. Product Description Narrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula. It can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor ligh