I asked my optician about AR-coating watch-crystals...

[a german in denmark]

As mentioned above, I asked if I could have my crystals coated. Couldn't be done, the size of the crystals is too small, and the companies that provide the service, don't have the proper mounting tools. Bummer...

[rangers158]

Well, you can get it done with chieftang or jakub. Proven quality.

[HauteHippie]

As mentioned above, I asked if I could have my crystals coated. Couldn't be done, the size of the crystals is too small, and the companies that provide the service, don't have the proper mounting tools. Bummer...

You don't want eyeglass AR on your watch crystal anyhow. It's not in the same league.

[chronoluvvv]

You don't want eyeglass AR on your watch crystal anyhow. It's not in the same league.

do indulge my curiosity ... what's the difference, Chief ?

[takashi]

scratch resistance, colour and effectiveness in cutting down reflections

[coolfire]

scratch resistance, colour and effectiveness in cutting down reflections

+1!

[paulw]

Chiefs AR is astounding, better than gen.

[HauteHippie]

do indulge my curiosity ... what's the difference, Chief ?

The coatings themselves are totally different and applied by different processes. The result with eyeglass coatings is typically a greenish color with much higher reflectivity and less durability. Most opticians will tell you to use special microfiber cloths whenever you clean the lens... With a truly durable coating, though, you can use spit and a T-shirt over and over and have no problems at all. But the reflectivity is what matters most, and eyeglass coatings don't perform.