B+W 72mm 093 IR Infrared Glass Filter F-PRO Germany

Made in Germany using high quality Schneider optical glass held in place by heavy duty brass rings, these filters are the epitome of quality. This is brand new, and sealed in original box.

This B+W Infrared Filter blocks the entire visible spectrum, so to our eyes it looks completely opaque.  Unlike the infrared 092 filter, it makes pure infrared photographs possible without the visible red component.  Its transmission only begins to exceed 1% at 800nm, rising to 88% at 900nm, and remains that high far beyond the upper limit of sensitization covered by infrared films.  This filter is used less frequently in pictorial photography because of the dramatic loss of effective ISO.  But in the scientific field, materials research and forensics, the limitation to a strictly infrared range is often important.  The filter factor is very dependent on the illumination and on the characteristics of the film.

Compared to the earlier B+W standard mount, The B+W Standard Filter Mount F-Pro has been improved considerably.  While maintaining the excellent quality of materials, fabrication, and high mechanical stability, the new F-Pro mount has become thinner, so that now it can also be used on many wide-angle lenses without the danger of vignetting.  Another advantage of the new F-Pro filter mount is its modified retaining ring, which is no longer threaded in from the front, but holds the filter glass in place from the back.  This prevents the retaining ring from being accidentally loosened during the removal of an additional filter or a lens hood that has been screwed in too tightly.

Note: All above Pictures are just for Reference