I want to put a good B+W filter on my scope, mainly for protection. Is there ANY optical advantage in using a UV filter over a plain glass protective one? Thanks.
I use a Hoya SMC UV filter on my Opticron Hr80 scope and I do find that it cuts down heat haze
Really? But that's physically impossible. Heat haze is caused by hot air rising from the ground. The different densities of the rising hot air and the surrounding cool air cause differences in the refractive index which makes the visible light 'wobble'. Just filtering out the UV can't change that.
Some people believe that a UV filter can cut down the blue haze you get when photographing long-distance landscapes. That was true in the days of film, which is sensitive to UV light. But digital cameras aren't - nor are our eyes. So a UV filter should have zero positive effect on anything you can see.
I want to put a good B+W filter on my scope, mainly for protection. .