Canon
Lens reviews for the Canon system.

Cokin 0.5x Wide-Angle Lens for Camcorders
Wide-angle and macro lens in one.

Kenko KVC 0.5x Pro Video Wide Angle Converter
A solid professional wide angle accessory lens.

Nikon
Lens reviews for the Nikon system.

Novoflex Nikon Lens To Canon EOS Body Adapter
Review of this unreal unity.

Raynox MX-3000PRO 0.3x Semi-Fisheye Ultra Wide Angle Conversion Lens
An extraordinary wide angle lens that doesn't turn your videos into fish eye.

Sigma
Lens reviews for the Sigma system.

Sima SLS-20 2x Telephoto Conversion Lens
An inexpensive telephoto accessory lens.

Some thoughts on the Olympus 1.45x Teleconverter Lens
Personal review of this teleconverter for digital cameras.

Sony VAD-PEA Lens Adapter
A God-sent item!

Teleconverter Magnification Comparison
Are you really getting the 2x magnification that the factory claims?

Tokina
Lens reviews for the Tokina system.