The Sigma 10-20mm f/4-5.6 EX DC HSM lens offers an ultra-wide zoom solution to digital cameras, and was exclusively designed to suit the characteristics of digital SLR cameras. The super wide-angle capability of this zoom lens (equivalent range of approx. 16-32mm when used with a Canon digital SLR camera) makes it a very powerful tool for both indoor and landscape photography. Note: Not compatible with "full-frame" (35mm size) cameras. Price is fix. No silly offer. thanks الماركة سيجما الحالة مستعمل