| RX FOR DIGITAL SLRs? Some lenses exclusively for digital SLRs: (clockwise from top left) Nikon, Sigma, Olympus, and Canon. All claim higher edge definition at wide- to ultrawide-angles, but do they deliver?|
Listening to various pundits, you'd think digital SLRs should come with warning labels about possible side effects. If these critics (and, to a lesser extent, several camera and lens manufacturers) had their way, they might read: Caution! On this digital SLR, wide-angle and ultrawide-angle lenses may not deliver wide and ultrawide fields-of-view. Furthermore, older lenses designed for 35mm SLRs may produce images with lower resolution, contrast, and brightness, especially toward the edges.