Specifications, comparison, reviews,
MTF-charts for lenses by Canon,
Nikon, Sony, Pentax, Olympus,
Sigma, Tamron, Carl Zeiss, etc.
Glossary of Terms (1)
IS stands for Canon's proprietary in-lens Image Stabilizer technology. Usually contained in lens name eg. (EF-S 15-85 mm f/ 3.5-5.6 IS USM) and in big lettering on lens barel (IMAGE STABILIZER). All detail about Image Stabilizer technology can be found here. Other after-market lens manufacturer call their image stabilizer system by different name for Sigma it is called OS and Tamron calls it VCSource:
Posted by: Radovan 25.02.2013 12:11:01