I tried to find that out at the Zeiss web site. Nothing there. Unbelievably vague. I will try the site that Dan recommended. Mil-Dot calculator-WOW I should have just bought the Leupold with VH reticle. I have a couple of them, and they work great. Oh well-something new to work with. Ain't that a shame. I guess I will just have to shoot it. What a drag. Tom.