If he wants to eliminate most LIGHT conditions that would cause a shoot or no shoot choice in the first 30min or the last 30min of legal shooting time he should add $600 more and get the one I did in 2010, for $2,228. All I have to do is know Temp & Altitude then my drop chart tells me what "Optimum Power Setting" to use then ALL my X hairs will be on zero, next range target to see which X hair to use.
The below price is $2,599.99 but every thing is up. If he does not want to go up $600 he can go down $1,000 and use the Zeiss $999 version and the process should be the same.
Zeiss Victory Diavari 4-16x50 Rapid-Z 800 Scope 5217779972
Zeiss Conquest HD5 3-15X50 RZ800 Scope 522621-9982-000
When I get out of the veh I set my scope to the "Optimum Power Setting" and I can fire as soon as target is identified and ranged.