Wired remote release for long exposure times and shake free photos ideal for macrophotography and extreme telephoto shots bulb function for shake free long term exposures two stage shutter release button adjusts distance with autofocus and triggers then suitable for canon eos 1100d1000d600d550d500d450d400d350d300d60d60daeos500300503330powershot g12g11g10 pentax ist ddsdldl2mz6k mk200dk110dk100dk20dk10dk 7k 5 samsung gx20gx10gx1sgx1lnx11 contax 645n1nxn digital equivalent to the original remote c