Canon SLR (single-lens reflex) owners now have an answer to Nikon's 18-200mm ultrazoom--as long as they're willing to buy a non-Canon lens.
Japanese lensmaker Sigma this week announced it's begun selling its 18-200mm ultrazoom for Canon SLR cameras.
These lenses are flexible, but typically have lower image quality than zoom lenses with narrower ranges or "prime" lenses with a fixed focal length. They're convenient, though, and often are called "vacation lenses" because they're popular with people who don't want to carry a big, heavy bag of better lenses.
Sigma'… Read more