The Sigma EM-140 DG Macro Ring Flash for Sony is designed to be used with popular brand of digital SLR and AF 35mm film cameras. The exposure compensation and high speed synchronization of the Sigma EM 140 DG Macro Flash allows it to be used for advanced photography. Most of the medical and scientific applications make use of this flash as it is highly effective.

• Even finer details of subjects can be captured using the shadow less mode of Sigma Macro Ring Flash EM-140 DG
• You can fire the dual flash tubes individually or simultaneously
• You can achieve a modeling effect just with single flashtube, which is capable of offering a 3D feel to the subjects
• The guide number featured on the flash is14 W/ISO 100
• You can check for shadows and reflections prior to the shooting the actual flash picture with the modeling flash function of the Sigma Macro Ring Flash
• Fine shadow details can be created using the wireless flash function. The EF-500 DG super act as a slave unit and the EM-140 DG can be used as a master
• The Sigma Macro Ring Flash EM-140 DG comes with 58mm and 55mm adapter rings. Some of the adapters like 52mm, 67mm, 62mm, 77mm, and 72mm can be got separately
• Power can be obtained from sources like AA NiCd battery, AA Ni-Mh battery or AA Alkaline Battery x 4pcs
• Highly compatible with cameras like EO-ETTL II (CANON), SA-SITL (SIGMA), PA-PTTL (PENTAX), NA-iTTL (NIKON), SO-ADI (SONY /’ MINC) and so on
  

Guide Number 14 ISO 100/m (when the flash is fired at full power)

Power Level    1/1   1/2   1/4   1/8   1/16   1/32   1/64
1tube-2tubes    14    10     7      5      3.5    2.5      1.8

Power Source: AA Alkaline Battery or AA NiCd Battery or AA Ni-Mh Battery x 4pcs
Angle of Coverage: Vertical / Horizontal 80 degrees
Weight: 430g (without batteries)
Dimensions (Controller): 76.7mmX136.2mmX82.4mm (3.0x5.4x3.2in.)
Dimensions (Flash Unit): 126.6mmX128.8mmX30.5mm (5.0x5.1x1.2in.)
Compatible Cameras: SA-STTL (SIGMA), EO-ETTL II (CANON), NA-iTTL (NIKON), PA-PTTL (PENTAX), SO-ADI (SONY/MINO