NOT KNOWN FACTUAL STATEMENTS ABOUT UNCOOLED LWIR LENSES

I utilised a Sony FE 12-24mm f/4 on an a7 II entire body converted to 665nm infrared. This is one of my favorite lenses for wide angle with infrared for the reason that if performs so nicely and handles an extremely wide range. You can find hot spots with apertures more compact than file/eight but with ultra huge lenses such as this you wouldn’t