UNCOOLED LONG-WAVE INFRARED LENS NO FURTHER A MYSTERY

I applied a Sony FE twelve-24mm f/four on an a7 II overall body converted to 665nm infrared. This is one of my preferred lenses for extensive angle with infrared because if performs so perfectly and covers an ultra big selection. You can find scorching spots with apertures more compact than f/eight but with extremely extensive lenses like this you