Vortex Crossfire 8x42 Binocular is an excellent bird watching binocular. This Vortex Crossfire binocular has what bird watchers want in both size, weight and features. Brace yourself for bright, true images and overpowering value with the Crossfire series. You can count on the full force of light-grasping 42mm objective lenses to pick out wildlife rustling through the woods from sunrise to sundown. This a favorite size by birders for bird watching.