English: The Beroflex AF28-70 1:3.5-4.5 is an early third-party AF lens released in ca. 1988, and was designed for the first generation of mainstream SLRs with autofocus capability, specifically Nikon F and Minolta A with screw-drive AF engagement. Versions for Pentax K as well as Canon EF are claimed to exist, but evidence is lacking. Beroflex was a West German reseller of cameras and photography-related gear imported primarily from East Germany, though not exclusively, and the actual manufacturer is Samyang of South Korea.

The lens has a 28 to 70 mm focal range and a minimum focus distance of 45 centimeters. The rotating front element is threaded for a 55 mm lens hood or filter. Weight comes in at about 380 grams with both end caps. On Nikon bodies, the lens relies on the camera's in-body AF motor and consequently cannot autofocus on cheaper models in the D3xxx or D5xxx lineup. It also predates the AF-D standard and exposure therefore may not be as accurate in certain situations such as when using fill flash.