77MM UV Filter Ultra Slim Japan Optics Multi Coated Ultraviolet Protection Lens Filter
SKU: KF01.K77
Q
What wavelength do these block?
Answer Question
A
I don't know about wavelengths. It blocks ultra violet light. The most noticeable effects are that A) it makes blue sky much darker at right angles to the sun and B) it will cut out reflections from the surface of water.