Promaster 5050DXR Module for CANON
From Promaster
PROMASTER 5050DXR Digital modules allow for seamless operation with the advanced features of your digital camera*. Features include an infrared focusing assist lamp to help you get sharp crisp pictures in low light. The DX Series Digital modules work only with the PROMASTER 5750DX, 5550DX, and 5250DX digital flashes and are not backwards compatible to other 5000 series flash units. This latest series of PROMASTER's advanced digital modules also incorporates the ability to upgrade the firmware to help ensure long and reliable service from your PROMASTER flash. *Features are limited to those supported by your particular camera model.
Important Information This is not a review of how well this product functions but instead is an important message to potential buyers. For newer Canon cameras such as the 7D, the firmware on this product must first be upgraded in order for the module to work properly with the newer EOS cameras. If the module is not upgraded, it will be useless (flash will not fire with the shutter but will suddenly do so on its own three seconds later). There is no way to know in advace if the product ordered has had the firmware upgraded. Therefore, I would suggest contacting the seller directly and verifying that their stock has been properly upgraded before placing an order. Once I receive an upgraded module that works, I will review the performance of this module and Promaster 5750DX flash on the Canon 7D. Update (11/28): I received a correctly upgraded module. Upgraded modules should have a sticker with an upgrade date on them. The flash now responds correctly, however, the module and the 5750 flash do not work together as a unit properly. It's the same problem situation I had with this flash (and different module) on the K20 Pentax: some flashes are very weak and sometimes the flash does not even fire. With the 7D, the problem now is more the rule than the exception. No mater how long you let the flash recharge, the next flash is likely to be dim. You can do a bunch of rapid discharges of dim flashes a second apart and then all of a sudden there's a normal flash. It must be a defective 5750 flash unit since the same type of problems occured with another module on another camera. Flash photography takes on a whole different character when you have to retake a shot several times. Lesson learned is for reliable performance probably best to stick with a flash unit that's the same brand as the camera.
