Sigma EM-140 DG Macro Flash for TTL & STTL SLR's, Guide Number of 45 with ISO 100 Feet.


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About Sigma EM-140 DG

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 whenthe 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.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Easy to use (5),Consistent output (3)
Reviewer Profile:
Photo enthusiast (3)

Sigma EM-140 DG 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

Sigma EM-140 DG 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
Power Source
4 AA Battery
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.)

Sigma EM-140 DG Reviews

Review Snapshot®


(based on 8 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 8 customers


Excellent Macro Ring Flash


from Tacoma, WA  -  Casual Photographer

This product is used on my NIKON D300 with TAMRON 90mm Macro Lens. Used for flower, insect and other types of macro photography. So far has worked very well. Easy to use. Instruction manual was easy to follow. Easy and quick to set up on lens being used.

(0 of 4 customers found this review helpful)


I don't trust Adorama any more!


from NC  -  Photo Enthusiast

I bought this expensive flash hoping that it meets description on Adorama website. It was mentioned that 55 and 58 mm adapter rings are included. I trusted Adorama hoping it knows what in the package. I am interested only in 58 mm ring and believed the flash will work for me. Can you imagine my frustration when I discovered that 55 an 62 mm rings are enclosed and 58 is unavailable in Adorama even as optional! Shame on you! I always bought previously from Adorama to support it against competition but I never do it again.


Works exactly as advertised.


from St. Louis, MO  -  Photo Enthusiast

Exposure algorithm is generally spot of, but runs a little bright in macro shots. Easy to fine tune it. Nice halo shadow for portraits or on macro shots with close background. No shadow with distant background. Very nice that is shoots one side at a time for texture shadows in macro mode. Need to be pretty close to notice the difference, so not so useful on, say, 100mm macro. Exactly what I needed for medical/scientific. Plenty powerful.

(1 of 2 customers found this review helpful)


returned next day


from Houston  -  Photo Enthusiast

feels and works cheap quality; works binary: the 2 tube flash units do or do not flash, no control for less or more light from each tube unlike the Nikon macro flash set; for me the left tube stopped to work after a few test flashes so I returned it to Adorama, who kindly replaced it with the Nikon R1 set, which is just a little bit more expensive, but a dream to use with sophisticated light-balance control even by the built in flash commander control in D90, so no need for the SU-800, when attached to the superior Nikon 105mm macro lens, with you can take sharp pictures at 1/200 handheld. If faster exposure is needed (I doubt) handheld then attach SB-600 flash to your camera with a diffuser and use as commander for the Nikon macro flashes with any high exposure speed you want. Do not buy this Sigma product, go for the wireless, versatile, durable Nikon macro flash set, which you can use as slave flashes for other purpose like portrait pics.


Performs as claimed


from New Jersey  -  Semi-pro Photographer

Has worked well for the month I have used it. It does give reasonable color reproduction and no shadows from 1 to several feet. The coil cord is a little stiff and may hamper some autofocus lenses. A dust cap for the lens ring would be nice

(0 of 1 customers found this review helpful)


I can't live without this product for my


from Columbus  -  Casual user

Easy to set up and use. Great for dental pictures

(3 of 6 customers found this review helpful)


Great when its working...


from Boston, MA  -  Semi-Professional

I got it for close to 2 years (not quite 2 years yet), use it for about 2 times a week for clinical photos. Its great in a way that its easy to use, compatible with iTTL and you can use NiMH rechargable battery (becareful, some other brands you can't use the rechargable). BUT one side of the flashing tube die on me yesterday and it pass the 1 yr warranty... For a [$] ring flash, seems like lasting only 2 years not very durable. I need to send it back to Sigma and hope I got a good price for fixing it...

(7 of 8 customers found this review helpful)


Very Pleased with Macro Flash


from Fort Wayne, Indiana

I use the Sigma Marco Flash with a D-70 and D-50 Nikon cameras for close-up work at fire scenes and during evidence examinations. I'm very pleased with the flash, it's an excellant value for the price. My only complaint, I had to buy from Sigma a adaptor ring for my 60 mm Nikkor Marco lens.


Questions & Answers Powered by TurnTo®

Questions about this item:

esther l  is this ring flash mounted in front of the lens or in my case, the macro lens? is this compatible with nikon d50?
CHANNING P  It attaches the front of your lens. I used mine one time and purchased the Nikon Creative Lighting System and will never use the Sigma ring again. It's flimsy and cheap and will not stay tight on the ring.
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