what strength is it?
uv lenses are avaiable in a number of intensities. what is this filter's intensity?
I think strength is a little misleading when referring to an Ultraviolet (UV) filter for camera lenses. UV filters should allow all visible light to pass through the filter, and only filter out light on the Ultraviolet range of the light spectrum. In the past there were certain films that were sensitive to some parts of the UV spectrum, but digital camera sensors are not sensitive to UV rays.
It is true that there are two different classifications of UV filters called L37 or L39. L37 filters remove all UV rays in the range of 370nm and shorter, while the L39 filters remove all UV rays shorter than 390nm. Since digital camera sensors are not sensitive to UV rays either type of UV filter will have the same exact effect on the image captured, which is none at all.
In fact the only benefit to having a UV filter attached to the front of a digital camera lens is to protect the front lens element, which is a very important thing to do. In all my years none of my SLR/DSLR lenses have ever been without a UV filter attached to the front of each lens. To be honest I don't know if this Rocketfish lens is a L37 or L39 UV filter, but if it is going to be attached to the front of a digital camera lens it makes no difference.
Hope this helps!
13 years, 1 month ago
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Posted by:
AllanBB
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Minneapolis