CJ, I also read the test/review on Chansingame. They said another weak point is the minimal overhang over the lens. In a rainstorm, the lens gets water on it and blurs the picture. They suggested putting some sort of a roof over the top of the rangefinder to help protect the lens from rain.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).