Comments about B + W B + W 72mm Infrared Filter # 092 (89B/RG695):

Filter does as advertised with the high quality I've come to expect from B&W Filters.

Both pictures were taken with an Olympus E-520, ISO-100, F/2.8, Focal Length = 12mm.

The first, the reference picture, the shutter speed was 1/250 sec. The second, the IR picture using the B&W 092 filter, the shutter speed was 3 seconds.

This gives an overall filter factor of 750. Taking into account the advertised 20 to 40 filter factor for the filter this leaves the internal E-520 IR blocking filter with a factor of 25.

Bottom line, IR photography is possible with a E-520 using this filter if the camera is mounted on a tripod.