PROFILPELAJAR.COM

Minolta AF Zoom 70–210mm f/4
Maker	Minolta
Technical data
Type	Zoom
Focal length	70-210mm
Crop factor	34.3–11.7°
Aperture (max/min)	f/4–f/32
Close focus distance	1.1 m
Max. magnification	1/4
Diaphragm blades	7 blades, straight
Construction	12 elements in 9 groups
Features
Ultrasonic motor	No
Lens-based stabilization	No
Physical
Max. length	168 mm
Weight	695 g
Filter diameter	55 mm
Accessories
Lens hood	Metal or plastic clip-on
Angle of view
Horizontal	34.3–11.7°
History
Introduction	1985

The Minolta AF Zoom 70–210mm f/4 lens (colloquially known as the "beercan") is an autofocusing telephoto photographic lens compatible with cameras using the Minolta AF lens mount.

It was introduced in 1985 at the launch of the Minolta Maxxum/Dynax/Alpha 7000 camera (the first widely successful autofocus SLR) and remained in production for many years. Two years earlier, the lens had been introduced as a one-touch zoom in the manual-focus Minolta SR mount (as a "plain" MD lens). However, production slowed and then eventually stopped for both the AF and MD versions; its successors, the 70-210mm f/3.5-4.5 and 70-210mm f/4.5-5.6 had none of the qualities of the original and build and image quality decreased.^{[citation needed]}

It remains popular, however, for use on digital single lens reflex cameras using the AF system, such as the Konica-Minolta Maxxum 7D or the Sony α. Although relatively bulky and weighty, the lens is valued for its solid build, sharpness, constant maximum aperture and smooth bokeh effect, though it suffers from more pronounced aberrations than equivalent modern designs. It provides a 1:4 magnification (at minimum focus, an object records at 1/4 its size on film or sensor).