Olympus OM-system F280 flash unit with manual.

The first electronic flash in the world to permit full synchronization at all focal plane shutter speeds. (when used with the OM-4 Ti).

Offers a selection of three modes : super FP/Normal OTF/ manual. The flash duration of about 1/25sec is some 40 times longer than normal electronic flash affording full synchronization at all shutter speeds up to 1/2000 sec top speed.

Main Specifications Olympus F 280 flash unit.

Type: Full-Synchro Flash System.

Guide Number: 28 (ASA 100 meters ) or 91 (ASA 100feet)

Coverage Angle: 53º vertical 74º horizontal.

Flash duration: Super FP flash emission: 1/50—1/125 sec. (OM4Ti) 1/70 –1/30 sec (OM707) Normal “OTF” flash emission 1/40.000—1/1000 sec.

Recycling time : 0.2–9 sec with AA alkaline batteries on normal “OTF” flash mode. Depending on auto subject distance . 5—9 sec Super FP flash mode ,depending on shutter speed.

Flashes per set of AA alkaline batteries : Super FP flash mode ;80 –260 firings depending on the shutter speed. 80—600 firings on normal “OTF” depending on the auto working distance.  Manual flash mode :80 firings.

Colour temperature : 5.800 K.

Connection to the camera: 1. On camera clip on via hot shoe. Lock-screw.

Electrical connection with camera : Clip-on method: direct contact-point type.

Flash Mode Selection:OM-4Ti : Super FP flash, Normal “OTF” Flash and Manual selectable with mode selection switch. OM-707 : Automatic selection by camera between Super FP Flash and Normal “OTF” Flash. OM camera with “OTF” auto flash mode : Normal “OTF” and Manual selectable with mode selection switch. Camera without “OTF” auto Flash mode; manual.

Test Firing: Push-button. type.

External power socket: For 7 pin quick release plug.

Power source:  R6 (aa) battery x 4(Ni-Cad battery can be used)

Dimension and weight: 110 x 68 x 71mm . 260 gram without batteries.