This document is an operating guide for the Vivitar 283 and 285 flashes. It provides information on precautions to take when using the flash, as well as instructions on how to power on the flash. The flash can be powered by four AA batteries or an optional AC power adapter.
This guide provides safety precautions and handling instructions for the Vivitar 283 and 285 flash units, including warnings about hot parts, damage inspection, and moisture protection. It explains how to power the flashes using four AA batteries or an optional AC adapter and describes the power‑on indicators.
The manual details the various modes of operation—automatic exposure control, partial power, and manual—along with focal‑length settings for the 285 model, use of the calculator dial for aperture calculations, and techniques such as bounce lighting. It also includes guide numbers and sufficient‑light indicators to help users achieve proper exposure.
| Power source | Four AA batteries (alkaline recommended) or optional AC adapter |
|---|---|
| Battery type recommendation | Alkaline batteries |
| Power switch indicator | Red light when ON |
| Focal length options (285) | Wide 35 mm, normal 50/55 mm, tele 105 mm |
The flashes are powered by four AA batteries, and an optional AC adapter can be used to plug into a wall outlet.
You can use automatic exposure control, partial power settings, or manual operation to take pictures with the flashes.
Adjust the focal length between wide (35 mm), normal (50/55 mm), and telephoto (105 mm) settings.