The Dynax 500si is a 35mm SLR camera manufactured by Minolta. It is also known as the Maxxum 400si and Maxxum RZ400si. A Date version was sold in American Ritz Camera stores the as the Maxxum RZ430si or 430si RZ as written on the body. A panorama variation called Maxxum 450si was also available, which is known as the α-303si (Alpha 303si) in Japan.
A Dynax 500si was also used as a test bed for APS film development[1]. It had additional APS frame markings in the finder and modified film opening on the camera back, but used APS sized film loaded into 135 fiim canisters.