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Message: <blockquote data-quote="brocknroller" data-source="post: 3283486" data-attributes="member: 665">If you could look at the light curve of an HT, which from the values that Gijs posted is almost parallel to the FL's light curve except with higher overall transmission and not quite as steep fall off in the red, it's easy to see why the HT and SF would have a yellow-green bias since the light curve looks like a dromedary camel with its tail down, with a huge hump in the middle and the light falling off in the red. You can even see the red reflected off the objectives, if it's not all being transmitted, it's coming back at you. <a href="http://www.allbinos.com/191-binoculars_review-Carl_Zeiss_Victory_8x32_T*_FL.html" target="_blank">light curve at bottom of page</a>This also explains the reports of images looking "washed out" in bright sunlight. Sunlight is composed of the full spectrum of what the human eye can see, but our eyes are most sensitive to yellow-green so when you got a big boost in the yellow-green in AR coatings on a sunny day, it can be "overkill" on brightly lit objects. Great for cloudy days and low light. I haven't seen the light curves for the Terra EDs, but the objectives reflect green (darker green in the case of the 8x42 and lighter green for the 8x32). I don't notice a yellow-green bias, and there's no wash out on brightly lit objects, so the AR coatings must be very different than Zeiss's top tiers'. Brock</blockquote>