This Troy mains properly fulfills its function and is a particularly useful accessory product photography in a studio. At power up my Canon 5D Mk II does not recognize it. I do not know if this is the case using the Canon power and this had not happened with the Mk I and Troy diet. Despite the lack of information of the load at the camera, the power running smoothly. Knowing that this accessory has no influence on the quality of the image, do not seem to me at all necessary to invest in the Canon hardware and I recommend this diet because of its much more reasonable price.
