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Message: <blockquote data-quote="ceasar" data-source="post: 3642991" data-attributes="member: 26155">Here is what Nikon's transmission on their best binoculars is like now. They are doing pretty good.  I don't know how far back it goes and the transmissions of Nikon's numerous binoculars will be different.But it is helpful to know that over the years Nikon binoculars have generally had their highest transmission showing percentages in the high 80s and low 90s from the middle of the light spectrum through the red section.  Over that time Swarovski has always tried to have  their highest numbers showing percentages in the high 80s and low 90s from the beginning of the ultra-violet/violet end of the light spectrum into the middle.  You have to keep that in mind while discussing the comparative transmissions of their older Porro prisms.  A high transmission in the ultraviolet/violet range of the light spectrum is preferred by many people  although over all  the best transmission is a relatively straight line across the full color of the spectrum with percentages averaging from the high 80s through the low 90s.Here are 2 Allbinos reviews of the top Swarovski and Nikon 10x42 binoculars showing their 2 different spectrums:Scroll to the bottom of each review to see them.<a href="https://www.allbinos.com/223-binoculars_review-Swarovski_EL_10x42_Swarovision.html" target="_blank">https://www.allbinos.com/223-binoculars_review-Swarovski_EL_10x42_Swarovision.html</a><a href="https://www.allbinos.com/215-binoculars_review-Nikon_10x42_EDG.html" target="_blank">https://www.allbinos.com/215-binoculars_review-Nikon_10x42_EDG.html</a>When the line averages 90% straight across, they are all bright!:t:Bob</blockquote>

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