18-35mm focal length, 27-52.5mm equivalent focal length on APS-C cameras
F1.8 maximum aperture; F16 minimum
Ring-type ultrasonic-type AF motor with full-time manual focusing, 72mm filter size
Minimum Focusing Distance 28 cm/ 11.0 in
Available in Canon EF (EF-S), Sony Alpha (DT), Nikon F (DX) mounts
Warranty: 1 year coverage for parts
Details: First wide-angle to standard zoom lens to achieve a large aperture of 1.8 Due to the very shallow depth of field (DOF) of fast glass and focus variation between the cameras, users may experience focus shift and inconsistent AF. This can be fixed by using the AF fine tune ( For Nikon System) or AF Micro Adjustment( For Canon System) in the camera’s Menu to calibrate the lens to specific cameras. Also shooting at smaller aperture values will increase the DOF which reduces “focus issues” as the result of the variations and decreases the amount of fall of (Vignetting).