Lenses For IR: ZEISS
Zeiss lenses are famously questionable for infrared due to poor hotspot performance, but there are some exceptions
The Sony Fluke
The Sony FE 55mm f/1.8 lens for the Sony A7 is a great lens. Relatively small and light considering how sharp and fast it is and the focus is great too. It's not a cheap lens, but it's almost perfect hotspot score turns it into an absolute bargain for IR shooters. Especially when you realise that there is no much of a focus offset for thr IR channel, so corner performance with 590nm is also stunning!
Specialist IR Lenses
Here are some demonstrations some