If I put a “B+W 67mm XS-Pro Clear UV Haze with Multi-Resistant Nano Coating (010M)” filter on my Nikon 70-200mm F/4 lens, would the Nano coating in the lens be affected by the Nano coating on the filter?
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#1. "RE: Nano Coating Question" | In response to Reply # 0JonK Nikonian since 03rd Jul 2004Fri 28-Dec-12 03:08 PM
There is no interaction between the filter and the front of the lens, so I'm not sure what your concern is.
You are, of course, putting an additional piece of glass in front of a very fine optic, which brings up the age-old question of image degradation due to the filter. You can search for the many threads on the subject. Bottom line: some use the filter to protect the front element of the lens, and some do not because of the degradation and the reasoning that if Nikon (or whoever) thought the lens neede more protection they'd have designed on another layer…
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#3. "RE: Nano Coating Question" | In response to Reply # 2benveniste Nikonian since 25th Nov 2002Sun 30-Dec-12 12:29 PM
Here's what B+W has to say about their nano coating:
The nanotechnology based characteristic (lotus effect) produces a better beading effect with water making the cleaning of this filter even simpler and faster than ever before.So while it has a similar name to Nikon's Nano Crystal Coat, B+W's nano coating serves an unrelated purpose. There's still no problem using the two of them together.
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#4. "RE: Nano Coating Question" | In response to Reply # 3Chris Platt Nikonian since 30th Sep 2012Thu 03-Jan-13 03:24 PM
The top layer coating provides that beading affect, but the other layers in B+W's MRC coatings perform the same function that multi-layer thin film coatings perform on all hiqh quality optics - reduced reflection and increased light transmission.
I continue to assume that the "nano" term used in both B+W's and Nikon's product names has it's origin in the fact the the thickness of the coating layers is measured on a nano scale. In order for the physics of anti-reflection to work, the thin film must have an index of refraction less than the glass, creating a double interface and, therefore, two reflected light waves. If the thin film thickness is 1/4 the wavelength of the light, the double reflected waves are 180 degrees out of phase and cancel each other out. The reflection is gone. Green light dominates the visible spectrum and has a wavelength of approx 510 nano meters, so a thin film to cancel it's reflection would have a thickness of only 127 nanometers. But that would only completely cancel reflection of green light with a 510 nm wavelength. Wavelengths close to 510 would be partially cancelled. Multiple layers of different thicknesses are added to cancel out reflection of most of the visible spectrum.
This is also a very long way of saying what the others have already said. The coatings just decrease light reflection and increase transmission and don't interfere with each other.
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