Lens Basics: Wide Angle Zooms
|Tree at Orlando Wetlands Park|
Nikkor AF-S 10-24mm f/3.5-4.5G DX ED
Nikkor AF-S 12-24mm f/4 G DX ED
Canon EF-S 10-22mm f/3.5-4.5 USM
|Effects of Wide-Angle Lenses on |
Relative Sizes of foreground and background
- Objects in the foreground will appear to be much larger than objects in the background. Put a leaf or flower in the foreground and a mountain in the background, and the leaf may seem larger.
- When the camera is pointed either up or down, objects will appear to bend toward the center of the frame the farther away they are from the focal plane of the camera.
|Wide-Angle Lens Looking Up|
|Notice the Lighthouse Bending toward the Center of the Frame,|
and notice that it doesn't appear to be perfectly round
- These lenses often have problems at the wider angles of the zoom: barrel distortion (straight lines look curved), color fringing (the wrong color appears along the edges of objects), vignetting (the corners and edges are darker than the center), and loss of sharpness along the edges of the frame. Many of these can be improved with software, but you still want to make sure that you start out with a good image.
- Your circular polarizer (CP) filter may not work well for two reasons. 1) If you'll remember from my post on CP filters, they work best when shooting at right angles to the sun. Because wide-angle lenses take in such a wide field of view, the effects of a CP filter will be uneven. 2) You may have increased vignetting. You can buy special CP filters that are extra thin--there's no threads on the front to let you stack filters. You may find this type of polarizer necessary at the wider range of your zoom lens.