I have a compact wireless remote release with extensive timer functions sought that fits my A55. This is precisely the Hahnel Giga T wireless remote release - its properties I have not describe here, everything was right and immediately work on the A55. Also on the hot shoe of the A55 fit the server part, the cable is connected easily to the remote connection. I am writing this review here because in the article description here the A55 or A33 is not mentioned. But these cameras on the packaging are indicated with - maybe the product description should be adapted here, so that other owners of these cameras are not irritated ...