What Is a Wide Angle Lens?
Wide angles lenses are simply a lens which can photograph a wide area. Landscape photographers might prefer this in order to capture large fields or mountains. A wide angle lens tends to be around 12mm-24mm. The disadvantage is that they don’t really double up as anything else.
This image was shot at 18mm and allows for a large amount of the scene to be captured.
A wide angle lens is any lens with a short focal length and a wide field of view. This lens allows the camera to capture much more of the scene than a normal lens can, making it great for architectural and landscape photography or any other application that requires the photographer to include more background information in the resulting image.
Wide angle lenses allow photographers to get as close to the subject as possible without excluding crucial elements in the background scene, giving viewers the feeling of being—as though they’re viewing the scene with their own eyes rather than through a photograph.
All wide angle lenses come in fixed (wide prime) and variable (wide zoom) focal length varieties
On a full-frame camera, any lens with a focal length of 35mm or wider is considered a wide angle lens, while 24mm and wider is considered an ultra-wide angle lens. On crop-sensor or APS-C cameras, you’ll need a lens with a field of view of 65 degrees or more (28mm focal length on a full-frame camera) to get the wide angle effect.
To determine the focal length, you’ll need to replicate the same field of view that a wide or ultra-wide angle lens can give you on a full-frame camera. Just divide the focal length of the lens by the digital multiplier, which is 1.6x for Canon and 1.5x for Nikon, Pentax, and Sony DSLR cameras. For instance, a 35mm lens will give you a focal length of 21.8mm on a Canon DSLR, or 23.3mm on a Nikon DSLR.