The Vivitar 285HV Flash is a powerful non-dedicated shoe-mount unit with a Guide Number of 120' (37 m) ISO 100 @ 50mm and has an auto exposure range up to 70' (21.3 m). This flash unit has 4 auto f/stop settings and built-in variable power to deliver accurate exposures and convenient fill-flash. The zoom head adjusts to 35mm, 50mm, and 105mm and can be set to bounce at 0°, 45°, 60°, and 90°. The unit has an easy-to-read lighted calculator dial so you can work under most lighting conditions, and it accepts optional high-voltage power sources for faster recycle time and more flashes.
- Guide number 120' ISO 100 @ 50mm
- Automatic exposure range to 70'.
- Accepts optional high-voltage power sources for faster recycle time and more flashes.
- Four auto f/stop settings for controlling depth-of-field and maximum auto flash range.
- Zoom flash head has three positions for covering 35mm, 50mm and 105mm camera lenses.
- Bounce flash capability for softer lighting.
- Removable sensor can be camera mounted with the optional sensor cord permitting automatic exposure when using side bounce flash photography.
- Built-in vari-power for convenient fill flash and rapid sequence photography.
- Auto Thyristor circuitry for faster recycle time and greater number of flashes.