I am about to purchase a new rangefinder and am wondering if the Leica CRF 1600 will give me a "line of sight" reading and a "shoot to" reading? From what I've read on-line it appears that it gives the angle but that is it--I have to do the math from there. If that is the case, I am thinking the cheaper CRF 1000 or 1200 with an angle cosine indicator mounted on my rail would be the same cost and give me the cosine to use. Any thoughts and/or ideas of how to go about this in the most efficient and effective manner???