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Message: <blockquote data-quote="denco@comcast.n" data-source="post: 3624211" data-attributes="member: 25300"><p>Your making this too complicated. Zeiss designed the HT for low light with higher transmission Schott Glass and AK prisms and they designed the SF with a bigger FOV and SP prisms and as an all-around birding binocular. They even say that themselves. It is logical that the HT is brighter than the SF. Instead of coming up with all kinds of theories why it isn't true just go compare yourself and you will see that under low light conditions that the HT is little brighter. Think about it. Why would Zeiss come out with two different models of binoculars if they performed in exactly the same way. Enough said.</p></blockquote><p></p>