Sigma 18-125mm F3.5-5.6 DC Lens for Sony

Sigma 18-125mm F3.5-5.6 DC Lens for Sony

This lens from Sigma has been created specifically for cropped sensor digital single lens reflex cameras (dSLR’s) with sensors in the region of APS-C size. It is given the DC nomenclature for this reason.

Build and Handling
This lens is supplied boxed and includes a petal hood and documentation in the carton. From the mount, which is metal, going forward there is a short area on which is mounted the AF/MF switch where required. This is followed by a good size zoom ring marked at 18, 24, 28, 35, 50, 70, 100 and 125mm. Two thirds of the ring is covered with a nice feeling ribbed rubber grip that provided good non-slip. A zoom lock is provided to keep the lens from extending, but we did not find this a problem with the lock disengaged. Forward of this and half the width was the manual focus ring marked with a distance scale in metres and feet and a 10mm band of ribbing. It required less than a quarter turn to operate from one extreme to the other and no sloppiness was detected.

On zooming, the front element came out of the barrel some 52mm (2”) and there is no further extension during focusing. The front element does not rotate during either operation, facilitating the easy use of filters. Focussing is quick enough for most purposes short of extreme action and although not silent was not over noisy and did not sound as though it was grinding into position as some lenses do. The petal hood, a bayonet fit, clicked into position positively and gave confidence that it would stay in place. Torque on the zoom ring feels right and it is smooth in operation.

Specifications

• Focal length 18-125mm
• Aperture f/3.5-5.6
• Angle of view 69.3-11.4°
• Filter size / type 62mm
• Construction Elements/groups 15 elements in 14 groups
• Focusing type
• Closest focus 0.5m
• Weight 0.385kg
• Dimensions (Dia x length) 70x77.7mm
• Mounts available Sigma, Canon, Nikon, Minolta, Pentax , 4/3rds
• Tripod bush No