A question about IR filters I ve a Digimax A7 and I am excited about getting an IR filter Well the first thing I needed to know that how sensitive my camera was to IR filters and I did a remote control test in which I saw the light very brightly so I think that IR photography would work fine with the camera The thing that bothers me is how do I install it on the camera in practice I hate it when there s no info on the internet about that And why are the sizes that I found on an online store only 44 mm or so minimum I presume it is mounted on the objective obviously but my objective is much smaller 37 mm to be precise Thank you in advance talk