This service manual provides detailed instructions for servicing the Vivitar Automatic Fixed Mount 28‑85mm f/2.8‑3.8 variable‑focus lens. It includes identification of mount configurations, operating principles, troubleshooting, special tools, disassembly/reassembly procedures, cleaning, lubrication, adjustments, and an illustrated parts list.
The lens is offered in seven mount configurations (Nikon, Minolta, Canon, Konica, Olympus, Pentax, Yashica/Contax) and the manual supplies part numbers, exploded‑view drawings, and service‑critical specifications such as weight, dimensions and focusing range.
| Weight | 650 g (22.9 oz.) |
|---|---|
| Length at Infinity | 105 mm (4.1 in.) |
The lens weighs 650 g (22.9 oz.).