The Sleeping Giant's Sea Lion

by Jakub

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29

Nanocoating: New and Different! To more specifically address the "Nano Crystal Coating" type of lens coating, as other answers seem to be either addressing multicoating in general or think nanotechnology coating is just a marketing term. Nanocoating is actually NOT the same as multicoating, it is very different in design, and affects light in a different ...


23

MRC coating is a good thing to consider if you want your filter to last long enough for your lens. MRC stands for Multi Resistant Coating is something like the weather seal for lenses. Its necessary if you tend to shoot in extreme conditions against mist/dust/water drops etc etc. MRC gives you a few benefits: Cleaning is easier. More resistant to ...


5

Anytime you clean a coated surface on an optical lens you risk damaging the coating. Repeated cleaning, especially if done too vigorously, could eventually wear the coating down. The good news is that the critical coatings for lenses are those inside the lens that prevent light from bouncing off the back side of an element causing flare or ghosting. In ...


4

The link you gave shows "Multicoated to minimize reflection at the filter surfaces which reduces flare and ghosting.". The layer of coating should be very thin (thickness comparabe with light wavelength in nanometers) and have very accurate thickness (measured sometimes in the size of atoms), the technology is expensive and this makes the multi-coated ...


3

Coatings are just special chemical compounds that are applied to the surface of glass filters and lens elements in order to change their optical properties usually in order to reduce reflections and other unwanted effects, as well as repealing water and grease, and providing resistance to scratches.


3

No, it is not. EBC is described as "multilayer coating": All the lens elements used in the X-S1 have been treated with multilayer Super EBC (Electron Beam Coating), Nanocoating however is NOT multicoating, it is a different process.


2

"and I'm looking for a filter to protect the front element" Don't. Add a lenshood and keep the front cap on when you aren't shooting. Any filter will compromise the optics of your expensive lens. "I've decided to go with B+W since they seem to have the best quality to match my L lens." That's the right thing to do for any filter, especially if it's going ...


2

Pentax patented "Super-Multi Coating" in 1971 while still making M42 lenses. This coating is still in use today and I'm not aware of anything actually doing much better with the exception of another Pentax coating. Which means, to answer your first question: there's no difference. :) Bojidar Dimitrov has a a very good writeup on the Pentax SMC and what it ...


1

If there is any hard dust particules on the lens, these can scratch the coating and lens itself while rubbing with microfiber cloth. It is hard to tell about lens cleaning solution, it might harm the coating depending on its ingrediens and the chemical chatacteristics of the lens coating. To be safe, do not use any cleaning solution that uses a solvent ...


1

I guess the most important reason for using subwavelength anti-reflection coating are the problems related with strong curvature of lenses. Multi-layer AR coatings work perfect for flat surfaces and lenses which are not too much bended. For the strong aspheres used for example by Nikon in all new zoom lenses like 14-24 f/2.8 see Nikon Precision Glass Mold ...


1

Here's a description of Pentax's implementation of nanocoating, called Aero Bright Coating (source): ...[the] PENTAX-original Aero Bright Coating...ensures outstanding anti-reflection performance over a broader wavelength range to deliver images that are brighter and of higher quality. Created using PENTAX’s advanced nanotechnology, this exclusive ...


1

I don't think the Nano crystal coat improves sharpness in and of itself. What it does, however, if give the lens designer more freedom in designing the lens. Before coatings came into use, practical lens designs were limited to about 5 element groups (at very most). Single coating increased that to around 7 or 8. Multicoating increased it to around a dozen ...


1

MCR (as already noted, Multi Resistant Coated) filters greatly reduce ghosting, something which has often affected exposures made with non-coated versions. Good filters and B&W are possibly the best, will not "compromise the optics of your expensive lens", cheap ones will. The coated versions from B&W cost considerably more, but in the end are worth ...



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