NOT KNOWN DETAILS ABOUT UNCOOLED LONG-WAVE INFRARED LENS

I used a Sony FE 12-24mm f/four on an a7 II entire body transformed to 665nm infrared. This is one of my most loved lenses for huge angle with infrared due to the fact if performs so well and covers an extremely wide range. You can get very hot places with apertures lesser than f/eight but with ultra extensive lenses like this you wouldn’t want t