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Reviews (1)
27 Apr, 2017
The Pentax version
1 of 1 found this helpful The Sigma EM 140 DG Ring Flash is a wonderful tool on my K-3. It has many capabilities that put it far beyond a Ring Light ( LED's ). It has 2 half flash rings - left and right - which can be used together, or independently. When used independently, -3 to +1 power output in P-TTL is available. Using only 1 tube gives a " 3D " feel to the image as the light is hitting the subject a little from the side. When used together, ( also in P-TTL ) the user has the ability to have different light output from each side, or the same light power from both sides, being able to be adjusted from -3 to +1 stops on the unit itself. Combined with the in-camera flash output, it makes this a very versatile flash. It is also wireless and HSS capable. There are a series of adapter rings that fit the front lens filter threads to mount the Ring Flash unit. They range in size from 52mm, 55mm, 58mm, 62mm, 67mm, 72mm and 77mm. When bought new, the unit comes with the 55mm and the 62mm adapters as these are the standard Sigma macro lens thread size. I bought mine secondhand, and it only had the 58mm adapter ring with it. In order for me to use my Pentax 100mm 2.8 macro WR ( 49mm thread ) it was a simple matter to get a 49mm to 58mm step-up ring. The build quality is very good. I can highly recommend this Sigma flash unit for Pentax users.