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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3432134" data-attributes="member: 92780">Lee, I would agree with your notion that all T* coatings are not created equal (just as Vespo said  :-O  )  - they would be indexed to the particular transmission properties of an individual optical design - including glass types, as are Leica's, Swarovski's, Nikon's, and all others. Only the design/composition, quality, layers, efficiency/cost and upgrade frequency would be differentiators. The SF definitely has a weak transmission in the bluish region compared to its competitors.  If there is some HT glass in there it's not showing in the transmission results - there needs to be more, especially the prism. Leica was able to get a few percent increase in transmission in that region by doing precisely that with its + model upgrade.I still think Zeiss has a hide in not providing the best of the best at the wounded bull prices they charge. Users may be unaware they are missing out in the abscence of viewing a better colour transmitting and balanced bin. I know you are fine with it, but many here have brought up the color cast of the SF. If there is uncomfortable noise about that, then so be it, it's Zeiss's own stoopid fault.I hope they rectify this when they bring out the 9x50 SF !  I look forward to comparing the SF's against the SV's under our bright light down here soon when Spring is sprung  .....  :cat:Chosun   :gh:</blockquote>