Anyone know what temperature it will be rated down to? Was in -14 and snow coyote hunting the last couple days and couldn't see the display on the Sig 2000 or the G7. It was very frustrating. Had to keep the g7 inside my shirt and then put my hand over the end of it to read the range. Combination of cold and bright conditions with the snow but now I'm hoping it will be addressed in the Sig 2400.