Compatible ONLY with Sigma brand cameras
The Sigma EM-140 DG Ring Flash is ideal for photographing subjects in fine detail - close-up photography - and is extremely effective for scientific and medical applications.
Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. 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, where 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 functions are also available for advanced flash photography.
| Guide No. | 46' (14 m) |
| Number of Flashes | 2 |
| Max Usable Diameter Size | 77mm |
| Modeling Light | Yes |
| Angle of Coverage | 80° (vertical/horizontal) |
| Auto f/Stops | No |
| Vari-Power | Yes; Full, 1/2, 1/4, 1/8, 1/16, 1/32 & 1/64 |
| TTL Dedication | Yes (S-TTL) [compatible ONLY with Sigma brand cameras] |
| Recycle Time |
6 seconds with alkaline batteries 4 seconds with NiMH batteries |
| Power Source | 4 AA batteries |
| Dimensions |
|
| Weight | 15.1 oz (430g) [without batteries] |