Sigma 70-210mm f3.5-4.5 APO (Manual Focus)
Launched February 1986

198670210APOMF002

From the Press Release dated 10th February 1986:

“The world’s shortest Apochromatic High-Speed Telephoto lens. One-Touch zoom, Helical focusing, which has an advantage for using polarizing filter. The lens will supply together with Achromatic Macro Lens for High Quality close-up photography.”

Specifications
Lens Construction 11 Elements in 8 Groups
Focal Length 70-210mm
Maximum Aperture Æ’3.5-4.5
Minimum Aperture f/22 (Æ’32 at 210mm)
Field of View 34-12°
Minimum Focus Distance 1.5m
Filter Size 52mm
Diameter 66.5mm
Length 107.5mm
Weight 535g
SRP at launch: £199
Available Mounts: Canon, Minolta, Olympus, Contax/Yashica