Sigma EM-140 DG Macro Flash 

The EM-140 DG Macro Flash is designed to work with both AF 35mm film and Digital SLR cameras of all-popular manufactures.

The EM-140 DG Ring Flash is ideal for photographing subjects in fine detail when the shadowless mode is used and is extremely effective for scientific and medical applications.

Dual flash tubes can fire simultaneously or separately. Using only one flash tube creates shadow, which can give a three-dimensional feeling to the subject. The flash features a guide number of 45 with ISO 100

The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture.

A wireless flash function is also available, when the EM-140 DG is used as master and the EF-500 DG SUPER as a slave unit for creating fine shadow details. High Speed Synchro and Exposure compensation functions are also available for advanced flash photography.
Features
Multifunctional Macro Flash designed to work with new Digital SLR cameras
Ideal for Close-up photography, especially medical and scientific applications
Fully dedicated with the latest TTL auto exposure systems
Flash tubes can be switched on or off for creative flash control.
Wireless Flash Control
High Speed Synchro Flash

Specifications
Guide Number 45 (ft) / 14 (Meter)
Power Levels Full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64
Angle of Coverage Vertical / Horizontal 80 degrees
Compatibility ETTL, ETT-II 35mm and Digital SLR's ,
Power Source 4 AA Battery
Weight 15.1 oz / 430g (without batteries)
Dimensions (Controller) 76.7 x 136.2 x 82.4mm (3.0 x 5.4 x 3.2in.)
Dimensions (Flash Unit) 126.6 x 128.8 x 30.5mm (5.0 x 5.1 x 1.2in.)

 

For Canon
For Nikon
For Pentax