Tamron SP AF 17-35mm ƒ/2.8-4 Di

If you’re in the midst of a transition from film to digital imaging, you’ll soon discover that your trusty 24mm wide-angle isn’t very wide on your D-SLR. In fact, that all-encompassing 24mm now acts like a 36mm normal lens! This, you’re finding out, is due to your image sensor’s smaller size in comparison to 35mm. While this effect offers increased telephoto reach on the long end, it causes trouble for users of wide-angle lenses.