Lens Coating Colour

[pizzainthemorning]

For our scopes we've got saphire (blue), emerald (green), amber (yellow), and ruby (red). What's the difference?

I think it has something to do with glare or clarity, but I really don't know and don't know which one is better than the other and for what conditions. Clarification?

Thanks,

Alex

[Syn]

ruby-coated objective lenses provide clear images without glare from what i have read. Sometimes on cheap scopes it is just added as a gimic to sell product.


http://www.birdwatchersdigest.com/si..._coatings.aspx
Binocular guide.

"There is one final consideration when it comes to lens coatings: color rendition. Today's sophisticated coating technology allows for specialty multicoatings that can enhance certain color wavelengths by screening out less desirable ones. This produces a lens coating that can be tailor-made for specific applications.
You can, for instance, design a coating that screens out more of the wavelengths at the blue end of the light spectrum. This produces a lens that enhances color at the other end of the spectrum, namely red, orange, and yellows and combination colors such as brown and tan. This type of coating is useful for hunters trying to pick out brownish animals from a predominantly green background. It produces images that are softer or photographically “warm.”


Of course, you can design a coating that enhances the other end of the spectrum. This produces a lens that emphasizes blues and greens at the expense of reds and yellows. This is sometimes used to improve contrast between light and dark areas and produces images that give the impression of sharpness. Photographically speaking, such a coating would produce a “cool” image."

[Qlong]

ohh nice find thanks, syn.

[pizzainthemorning]

Thanks, that's great. It kind of sucks that you can't really know if a colour means anything then, but it still clears it up, so thanks.

Alex

[Kos-Mos]

Since it's an optic filter... you can assume that a ruby coated lens will enhance the red side of the spetrum, while a saphire (blue) coating will do the opposite.

*edit* point is... for airsoft purpose you want a red lens.