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The Konica Minolta AF DT 18-70mm f/3.5-5.6 (D) is a versatile standard zoom for Minolta AF and Sony A-mount cameras with APS-C sensors. It covers a 27-105mm equivalent focal range, from wide-angle to short telephoto, which is a bit more reach than a typical 18-55mm kit zoom. That makes it a flexible everyday lens for travel, landscapes, interiors, family photos and casual portraits. It was originally developed for Konica Minolta’s Maxxum/Dynax digital SLRs, and the same optical design later continued as the Sony DT 18-70mm.
The DT designation means the lens is designed specifically for APS-C sensors, which keeps it compact and light. It isn’t intended for 35mm film SLR cameras. On full-frame A-mount digital bodies, it’s meant to be used in APS-C crop mode.
The optical design uses 11 elements in 9 groups. It includes one AD (Anomalous Dispersion) glass element to control chromatic aberration and one aspherical element to control distortion and spherical aberration. Image quality stays clean and consistent across the zoom range. A 7-blade circular diaphragm gives a smooth, natural background blur when shooting toward 70mm or focusing on nearby subjects.
Autofocus is driven by the camera body’s in-body AF motor through a screw-drive coupling, so it works with compatible Minolta AF and Sony A-mount cameras. The (D) designation means the lens sends distance information to the camera. That supports ADI (Advanced Distance Integration) flash metering for more accurate flash exposure with compatible bodies and flashes.
Minimum focus distance is 0.38m (1.2′) throughout the zoom range, with a maximum magnification of 0.25x, which is useful for flowers, food and small details. The lens measures about 66 x 77mm, weighs about 240g (8.5 oz) and takes 55mm filters.
Key Features
– Standard zoom for Minolta AF and Sony A-mount APS-C cameras
– DT design optimized for APS-C sensors
– 18-70mm focal length (about 27-105mm equivalent)
– f/3.5-5.6 maximum aperture, f/22-36 minimum aperture
– 11 elements in 9 groups
– 1 AD glass element and 1 aspherical element
– Screw-drive autofocus via the camera’s in-body motor
– (D) distance encoding for ADI flash metering
– 7-blade circular diaphragm
– Minimum focus distance of 0.38m (1.2′)
– Maximum magnification of 0.25x
– 55mm filter thread
– Weight about 240g (8.5 oz)
– Dimensions about 66 x 77mm
