>>2994335You need to put some glass instead anyway, It's designed to have filter and won't focus prorerly
without.So, you need to use 2 glasses ( clear filter and infrared ones). It will be impossible to use viefinder with screwed IR, but you can still use LW.
I'd like to use optical finder and you can also use it with any lenses, including fish eye. Focus shift is usually not a big problem, especially shooting stopped down.
