ir photography

A question for the ZEISS users. I have a very good condition ZEISS Planar 85mm 1,4 ZF-IR (for nikon) lens that I recently acquired. This lens was discontinued and I cannot find it anywhere online! Does anyone know the value of it? Looking for help, thanks a lot! Jake

Hello forum! So ive recently discovered the curious and interesting world of IR photography and I would love to give it a go. So before i go out and buy a filter and start trying things out, I was wondering if anyone has had some experience with this type of photography? any tips or...