Hi all,
I have been looking at terrestrial IR-pass filters, similar to the Hoya R72 or Wratten gel filters BUT i also saw on the hutech site the Camera Body Front Filters:
IR720-FF (Visual blocking, IR pass)
http://www.sciencecenter.net/hutech/filters/ffilter.htm
These are a bit expensive compared to the Wratten or Hoya options, although probably are better...
Does anyone know of any other brands that do a similar thing?
cheers.