UNCOOLED LONG-WAVE INFRARED LENS NO FURTHER A MYSTERY

I used a Sony FE 12-24mm file/4 on an a7 II system transformed to 665nm infrared. This is one of my beloved lenses for extensive angle with infrared due to the fact if performs so properly and covers an ultra wide range. You will get hot places with apertures smaller than file/8 but with ultra extensive lenses like this you wouldn’t need to have