I am wondering about the need for an IR cut filter for use with the Hitech 85mm "Master Kit".http://preview.tinyurl.com/Hitech-Master-Kit
I'm also wondering about the incredibly high cost of an 85mm "Hot Mirror" when circular "IR cut" filters are so much more reasonably priced. I understand there is a difference between the two, in that, one one uses reflectance and the other uses filtration. I also understand that I can, at times, be woefully misinformed.
As for why I wouldn't just go for an ND with built in IR I am of the opinion that there would be times when the IR cut wouldn't be needed and so could remain undisturbed and protected in it's case. Replacing a heavily used non-IR ND in case of damage would be less than an ND/IR filter. It's sort of moot really because I can't afford ND filters with built in IR so I;m stuck with going for a separate IR cut filter.
Thanks for... wait for it...
clearing this up for me.