- Product Reviews
- Gear Guides
- Tip and Tutorials
- Adorama TV
If one way to overcome problems associated with low light is to shoot at a wide aperture, then you need a wide-aperture ("fast") lens. Most kit zoom lenses only open to around f/3.5 or f/4, and fast zooms that maintain a maximum aperture of f/2.8 throughout the zoom range cost a mint.
Why is it called normal? On a 35mm film camera 50mm was the focal length that most closely represented the human eye. On a DSLR with an APSD sensor, it becomes the equivalent to 75mm, a modest telephoto; to get a normal lens on an APS-sensor, you need a lens around 30mm.