It has been made available in Nikon, Canon, Pentax and Sigma SLR cameras. It has a focal length of 12-24 mm. The lens aperture ranges from a maximum of F22 to a ...

Sigma 70-200mm f/2.8 HSM zoom lens is a professional lens in the same league as the Canon 70-200mm f/2.8 L USM lens.

The Sigma 20mm f/1.8 D EX DG Aspherical Lens has a solid build, a cool and rugged finish, a non-rotating front, and a metal lens mount.

On the contrarry I enjoyed using this lens more than I think I would have with the Canon 35-80mm lens. In fact, I feel I have gotten more "better" picture then ...

This one has a solid build, a cool and rugged finish, a non-rotating front, a metal lens mount, and is very heavy.

The Canon EF-S 18-55mm f/3.5-5.6 lens is an extraordinary macro zoom lens. Canon is silent about this lens's macro capability and the lens body quietly showed ...

The Canon RS60-E3 remote switch is a simple device that can be easily extended using easy to obtain and readily available parts.

Explains the purpose of stacking teleconverters and how to calculating focal length, aperture, and aperture diameter.

This particular lens is quite small and feels really light (305 grams only), and comes with a built-in petal shaped hood. However, it doesn't feel cheap as the ...

Some thoughts on the Canon 50mm f/1.8 II lens. The value of this lens is exceptional. At $80 from B&H, it is one of the cheapest lenses available.