Attached Link: http://dpfwiw.com/ir.htm

here's some of what i read. I've included the link where i took this from. "The Sony DSC-7x7's Nightshot Mode With built-in NIR illuminators and a "Nightshot" mode that removes the IIRCF from the lightpath to the CCD, Sony DSC-F7x7 digital still cameras excel at IR-enhanced low-light work. They would seem to be naturals for daylight IR work as well, but Sony felt a need to force auto-exposure metering and to restrict Nightshot exposures (f/2 at 1/60 sec or longer) to keep voyeurs from subverting Nightshot to see through clothing during the day. (Some fabrics are apparently transparent enough in the NIR to reveal what's underneath in bright sunlight.) These firmware restrictions pose challenges for legitimate daylight IR work with F7x7 cameras, to be sure, but with ISO locked at 100, a deep IR filter (e.g., the Wratten 87c or the Hoya RM90 or RM100) and one or more ND filters to cut daylight NIR input, the F7x7s can rise to the occasion, as Paul Cordes recently detailed on RPD: I'm using a B+W 58 093IR, equivalent to an 87c. The filter is absolutely black and admits no light to visual inspection. The pictures are great.... You'll also need some Neutral Density filters, as the 707 is limited to f2 and 1/60th sec as the fastest shutter speed (Nightshot Mode). I'd suggest 0.3, 0.6 and 0.9 ND filters to give you flexibility for exposure control. If you don't mind a 3-filter stack, you can skip the 0.9 ND. Don't forget to block the IR emitters with something IR-opaque, or you'll see reflections from the back side of the filters. Stacking filters of course results in vignetting. If you think that you will be stacking, a step-up ring and IR and ND filters of, say, 67mm might be a good starting choice. Wish I had thought of that before I bought mine! Paul recommends the "Sony Talk" forum at www.dpreview.com as a good resource for F7x7 IR photographers."