Sigma 14mm

Make it Really Wide

My standard wide-angle lens when I work in 35mm is theCanon 17~35mm f/2.8L. This is a very versatile lens and provides coverage as wide as I ever need. For wider coverage I will use one of my panoramic format cameras.
But the digitalCanon EOS-D30changes the equation. With an imaging chip smaller than a 35mm frame, focal lengths are multiplied by a factor of 1.6X. For telephoto work this is a boon, making a 300mm lens, for example, into almost a 500mm. But when it comes to wide angle this means that even ones widest lens probably won't be wide enough in many situations. The 17mm end of the widest Canon zoom only gives 28mm coverage when used on the D30.
The widest rectilinear lens focal length available for Canon EOS bodies is 14mm. On the D30 this will provide coverage equivalent to a 21mm lens. Not ultra-wide, but a lot wider than 28mm. There are three choices, all are 14mm and all have /2.8 maximum apertures. They are fromCanon,TamronandSigma.
Normally my prefer...