Aperture average transmittance (8-12 μ m) Rear intercept 22.47mm>78% 0.9~1.2 Optical characteristics Horizontal viewing angle (degrees) 25 μ M 17 μ M 12 μ M 8.47 5.77 4.07 320x240 640x512 1024x768 1280x1024 16.85 11.51 8.14--12.98--16.19 Horizontal viewing angle (degree) Wide field of view (18mm) 25 μ M 17 μ M 12 μ M 25.06 17.19 12.18 320x240 640x512 1024x768 1280x1024 47.92 33.63 24.09--37.69--46.21 Working temperature -40 ° C~+70 ° C Storage temperature -50 ° C~+80 ° C Protection level IP68- Only the front end of the lens is coated with DLC film. Environment focusing motor 12VDC (current<0.6a)