Recent years have seen staggering innovations in cameras, most notably involving ISO speed, sensor size in compacts, and video capabilities. Despite these advances, however, one thing has divided the industry for more than 10 years but has rarely been talked about—that is, until recently—optical low-pass filters. Many cameras include them, but some do not. There are believers in both camps but the only thing that’s clear is that the issue is far from decided.
Every lens maker offers standard types of lenses: wide angle, normal, and telephoto zooms plus several primes in popular focal lengths. Although highly useful, these lenses alone do not represent the breadth of offerings available. Hidden away within the lineups of many lens makers are specialty models which, even if they aren’t suitable for one’s purposes at any given time, are fascinating not only for their unique qualities but also because they might someday be the perfect tool for a specific shooting situation.