Sigma 18-125mm f/3.5-5.6 DC - unknown Mount

The Sigma 18-125mm f/3.5-5.6 DC is a versatile zoom lens designed exclusively for digital SLR cameras with APS-C sized sensors. Offering a 7x zoom ratio, it provides an effective focal range equivalent to approximately 27-188mm on a 35mm format. The optical construction includes two SLD (Special Low Dispersion) elements and two aspherical elements to correct aberrations throughout the zoom range. Its compact form factor makes it a practical choice for travel and general-purpose photography where a single-lens solution is preferred. When purchasing a used 18-125mm DC, the zoom action should be inspected for consistent resistance, as older copies can develop zoom creep or stiff spots. SDS checks the internal optics for dust ingress and ensures the autofocus motor is responsive and accurate across the entire range. The external barrel should be inspected for wear on the textured finish, and the mount should be checked for secure connection to the camera body.