A question to the photographers...and others too

[perniciosa]

Anyone has any knowledge of IR photography? What IR filter, if any, can be used with Canon EF-S 17-85/4-5.6 IS USM objective? Is Hoya R72 ok?
Thanks

 

[Karmic]

Yeah, the Hoya is supposed to be really good for it. Not sure about the exact camera lenses though