Used Leica SF20 Flash - Black for R8 and M6TTL and MPTTL Cameras

Shoe mount

20m/68'
14m/46' with wide-angle diffuser (for ISO 100/21°).

24-28mm diffuser

Auto Distance Range 23' (7.0 m), 11' (3.4 m) , 5.7' (1.7 m)
Auto F/Stops f/2.8, 5.6 & 11

63° (35mm lens in 35mm format)
84° (24mm) with wideangle diffuser

in A/TTL mode approx. 0.5 - 5s
in M mode approx. 5 - 6s.

two lithium batteries, type DL 123A, CR 123A or similar

2.6" x 4.3" x 1.6" (66 x 109 x 41mm)

0.38 lb (170 g)

Flash exposure correction, for TTL +/- 3 EV in 1/3 EV steps, for A 0 - 3 EV in full EV steps, Partial light output for M, 1/2, 1/4 and 1/8.
Film speeds: in "A" mode ISO 25/15° - 800/30°, in TTL mode ISO 12/12° - 3200/36°
Flash duration: in A/TTL mode 1/30000 - 1/250s, in M mode 1/250s (at full power).
No. of flashes/set of batteries: approx. 250 (full power).

Modes: 1. TTL (camera controlled flash exposure for use with LEICA R8 and LEICA M6 models with TTL metering).
2. "A" (flash exposure is controlled by the flash unit when the flash is used with other LEICA cameras; three automatic f-stops: 2.8, 5.6 and 11).
3. "M" (full light output; partial light output possible).