A friend and I decided to participate in the latest Strobist Boot Camp II exercises by David Hobby, (Strobist Blogspot) and for my head shot, I wanted to see if I could use an MR-14EX macro ring flash as an on-camera fill. This image is the result of my test.
The posted head shot here (courtesy of my friend, Fred!) is the result. I had a Canon 580Ex off to the subject’s right with a Honl grid, set on slave and triggered by the MR-14ex on the camera. The MR-14ex was set on manual and since the two strobes are already on banks A and B, I set the 580Ex on bank C. I manually set A and B to 1/64 power and the C bank (580EX) to 1/16 power so it would act as the key.
The result: I believe the MR-14EX can act as an on-camera fill for short distances, perhaps up to 8 – 10 feet. The biggest disadvantage is that one is limited to the Canon macro lenses that support the MR-14EX! In this case, I used the 100mm macro, which is a great lens and the length is good for portraiture.
I shot this with a Canon 5D MK II set on manual mode – 1/50 sec and f/6.3. I am pleased enough to continue experimenting with this setup!!