Wide Angle Converter

Wide Angle Converter
I have a Canon 400D with kit lens18-55. "I can get a better wide-angle converter? Any advice?

if you get a thing of the optical quality will be marginally better to look something like an EF 14mm f/2.8L USM lens of the camera a bit expensive but is perhaps a series L, no great increased width, but the sharpness Impress after a very expensive kit lens on ebay try searching perhaps

Vado HD and Impact Wide Angle Converter Lens