NOT KNOWN FACTS ABOUT UNCOOLED LONG-WAVE INFRARED LENSES

I utilised a Sony FE twelve-24mm f/four on an a7 II system transformed to 665nm infrared. This is among my favorite lenses for large angle with infrared simply because if performs so perfectly and addresses an ultra wide range. You can obtain warm spots with apertures more compact than file/eight but with ultra wide lenses similar to this you would