B+W UV MRC or B+W Protector MRC Filter?

[vladik]

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B+W UV MRC or B+W Protector MRC Filter for Leica lenses on M9 and Why?

The UV would filter out just that UV, the Clear protector filter will not. In the film case logic would have it to use UV filter. In the case of M9 senser does it matter if the UV reaches it? Please let me know your thaughts. Thank you.

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[richfx]

I've heard and read (including directly from B+W) that its UV filters (series 010) do not filter out any available light. Its 007 clear protective filters of course are also said not to.

 

Unable to get a convincing answer, since one can reasonably assume that a UV filter, in filtering out UV light, does filter out some available light, I have opted for B+W's 007 clear protective filters on my lenses unless the 007 is unavailable or can't be used, such as on the new 35mm Summilux ASPH FLE due to the very tight tolerances of the hood when screwed onto the lens body. There, I opted for a Leica UV filter (Leica does not offer clear protective filters to my knowledge), as B+W's are just slightly too large to accommodate the Summilux's lens hood.

Rich

[ho_co]

Since modern Leica lenses do not transmit UV, using a UVa filter on them will not change the light reaching the sensor or film.

 

Either type of filter should work just as well.

[mmradman]

Almost any glass (window glass for instance) will block some or all of UV spectrum. So clear filter, including UV, is mostly for protection. As far as I know Leica lenses block most of UV therfore legacy Leica UV filter is used primarily for protection - if user is so inclined. Filters with UV blocking is historical appendage from the days when shooting colour film in high mountains.

 

Difference between B&W 010 and 007 is pure marketing.

UV enabled lens are very rare, for instance current Coastal Optics 60mm UV lens.

[jaapv]

The 007 filters are preferable, as they are thinner, thus (even) less degrading and have higher impact resistance. That makes them more fit for the purpose. The UV blocking function of the IR filters is superfluous, as all Leica lenses are UV proofed since the early 1950-ies.