Product Description

ELECTRONIC FLASH MACRO EM-140 DG is designed to work with both AF 35mm film and Digital SLR cameras of all the popular manufactures. The EM-140 DG 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 flashtube creates shadow, which can give a three-dimensional feeling to the subject.

Product Details

• Brand: Sigma
• Model: B00064XR6Y
• Dimensions: 5.60" h x 7.40" w x 9.50" l, .95 pounds

Features

• 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
• Guide number of 14 (ISO 100)
• Ideal for close-up photography, especially medical and scientific applications.55mm and 58mm adapter rings are included with the flash. 52mm, 62mm, 67mm, 72mm and 77mm adapters are sold separatly.

From the Manufacturer
The Electronic Flash Macro Ring EM-140 DG is designed to work with both AF 35mm film and digital SLR cameras of all popular manufactures. It 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 flashtube creates shadow, which can give a three-dimensional feeling to the subject. The flash features a guide number of 14 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.

• 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
• Guide number of 14 (ISO 100)

G/No. 46/ft, 14/m (ISO 100)
Power Level	1/1	1/2	1/4	1/8	1/16	1/32	1/64
2 tubes (ft)	46	33	23	17	12	8	6
2 tubes (m)	14	10	7	5	3.5	2.5	1.8

Compatibility with Canon AF SLR and Digital SLR Cameras
EM140 Ring Flash	Canon EOS
TTL 35 Film SLR	ETTL, ETT-II*1
TTL Digital SLR	ETTL, ETTL-II*1
Distance Priority Manual Flash	-
High Speed SynchroFP	O*2
Multi Flash	O
Exposure Compensation Function	O
Modeling Flash	O
Wireless FlashTTL	O*2*4
"O" Available, "-" Not available *1: Compatible with E-TTL and TTL. Please note A-TTL automatic exposure is not supported. *2: This function is not supported by some camera models. *3: Compatible with 3D-multi BL exposure. *4: Manual exposure is also possible.

Customer Reviews

Excellent
Very useful for intraoral and macro photography. I would highly recommend this product for Dental photography.

Excellent ring flash for dentistry
I have employed my Rebel XT digital SLR into my dental office. I upgraded to the Rebel XTi (10 mpixels) for home. I purchased the Sigma ring flash with a Sigma macro lens for the Canon SLR family. If you look at the Lester Dine website this is basically what they sell for a few hundreds dollars more.

I compared the ring flash and lens with the ones offered by Canon and felt that it was worth saving $300 by purchasing the Sigma combo.

The macro lens/ring flash work well for dental purposes. After a little experimentation I discovered that I get the best images by using the aperature priority setting. All settings are used with ISO 400 speed. I set the aperature at 14-16 for intraoral shots. This gives the best depth of field. I also use the operatory light for intraoral shots. I set the aperature to 6 for full face shots.

I use autofocus but set the ratio to 1:2 to 1:3 for intraoral shots. This keeps the autofocus from "hunting". I frame the shot by moving towards the subject. Once I get close to the image that I like I use the autofocus to get the final focus for the picture.

EM 140 DG
Finally a flash Nikon should have produced long ago. I shoot a lot of macro and have used the Nikon SB 29s with my Nikon D100. Unfirtunately that flash forced me to use manual mode as it doesn't know about digital camears. This is fine most of the time, but sometimes you don't have the time to experiment and shoot bracketed series, etc. So I went out and bought this flash.

a) Yes, it definitely works fine with Nikon's older D-TTL system besides the newer i-TTL. The D100 uses D-TTL. The D70 i-TTL.
b) It is a really nice piece of work.

I sold my SB 29s. The LCD panel on the back is not immediately obvious, but once you have flipped through the few pages of the slim handbook (takes about ten minutes). all is clear. The automatic TTL works fine when you're in a rush, like when you are shooting medical operations on the fly or when trying to get that butterfly shot before it flies off. The manual adjustment options are really really worth spending some time with and experimenting with. Like the Nikon SB 29s, this is not actually a ring flash, but consists of a tube on each side of the flash. With this flash, you can control the flash power of each tube separately, from full power, through 1/2, 1/4, 1/32, 1/64 or off. This is really great and a lot of fun, if you have the time to experiment.

All in all, an excellent piece of equipment. No competition currently out there. Yet.

The only reason I didn't give this flash five stars is because it isn't immediately intuitive to set all the cool features ion manual mode. I guess it merits a four and a half rating.