1D MC: Digital multi-coated

Hoya / Kenko up some nice names like:

Standard coating (standard coating)， each layer is coated on both sides of the lens， the average transmittance of 94-95%

Digital multi-coated (DMC)， SMC is on both sides of the lens on the basis of a total of 12 layers in the back to add a layer of special lens coatings， the first six to seven layer after layer， specifically for DSLR absorb reflective， theoretically， DMC lens After coating the digital optimized to a greater degree to reduce lens flare and ghosting.

That so many tricks， really amazing work? There is a saying， piece is the last word， others are false. / 1.4 at f1.4 and f8 comparison made simple with Nikon's name mirror AF85. At f1.4， ghost looks like glare， blurred a group. In f8， ghosting is very clear， the internal structure of the light source can be seen. In any case， there is no filter coating worst spot bright， distracting. Multicoating increased slightly but not significantly， it is estimated DSLR's sake， the film machine effect may be better. Improve the degree of DMC is very clear， spot brightness reduced exponentially! 1.4 aperture under difficult figuring， have been very close without the effect of the filter! Of course， without the use of filters， the ghost is the weakest， at 1.4 aperture substantially without ghosting， just faintly visible under 8 aperture. (This is confirmed by the ghost is not entirely from the filter， the lens itself can be one source of the way， not to pull up.)

 

1， BAF Black brushed aluminum frame to prevent reflective
2， BRG black glass edge to prevent reflection
These two are not complicated， but also simple to verify， put down filter collar screw， you can see， a very low-tech.
3， LPF thin structure
Nikon CPL II series of the same， ultra-thin structure is another big selling point of this filter. CPL's general frame 5 mm thick， ultra-thin filter thickness is reduced by 40 percent to 3 mm， and ordinary UV lens as thick， greatly reducing the lens particularly wide-angle lens produces vignetting possible.

 

4， ultra-thin frame， it requires a thin lenses， it is said Kenko Pro1D filter lenses only 1 mm thick.
Familiar Hoya knows， Hoya Pro1 also slim structure. But Pro1D than Pro1 a great advantage: Pro1D with front thread， can the lens cap! Not only to facilitate the protection of the lens， and can light show， after all， the word is more than the Nikon lens cover body， lens body to be several times larger!

5， KEF vertical frame knurling， to prevent the hand sliding， easy handling， and aesthetically pleasing. Knurling this filter workmanship is very good indeed， there are pictures Korea style.

 

6， UVC UV filter cartridge to extend the life
While the Kenko / Hoya did not elaborate， this technique is named， it can be inferred CPL UV on the life is influential. Moreover， Kenko / Hoya expressly oppose the use of any lens filter water scrubbing， avoid injury coating.