All Forums  General Discussion  Collectors and Users Open Forum  MC coated Tair-3S, rare or not?

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Antispam question: Please provide registration password: Answer: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON New! Upload Image Smilies [quote][i]Originally posted by Luiz Paracampo[/i] [br]Zhang and Allain I will tell you the truth about coatings. Single coating is a REFLECTIVE layer of intermediate REFRACTING index air-glass intended to make a 1/4 light wave length interference. The light reflects in two surfaces with its train of wave lenghts. One of them is totally nullified the others almost nullified but one of them will be reinforced or "ressonant" this will be the most noted colour of the coating, although coatings itself have no colour at all. The thickness of the coatings will give the apparent colour in the lens. That way, the blue represents the thinnest coatings while the red will be the thickest of them. Multicoatings do the same with progressive Refracting indexes Thicknesses are controlled to obtain the maximum combination of internal reflections of layers and obtaining the better combination of the red, the green and the blue 1/4 waves. that way, you will note no reflections. So, a good multicoated lens is totally BLACK You even do not see the glasses of the lenses! Regards LP The great varieties of sold MC lenses does not fulfill what they claim. LP [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.