55D

55D is a designation that can refer to several different things depending on the context. One prominent instance is its use in Canon's EOS digital single-lens reflex (DSLR) camera line. The Canon EOS 55D, also known as the Canon Rebel T2i in North America and the Canon Kiss X4 in Japan, is a mid-range DSLR camera released in 2010. It features a 18-megapixel APS-C CMOS sensor, Full HD video recording capabilities, and an ISO sensitivity range of 100-6400, expandable to 12800. It was designed for enthusiasts and hobbyists looking for an upgrade from entry-level models.

Beyond photography, "55D" might appear in other technical specifications or product codes. For example, it could be a model number for an electronic component, a part in a manufacturing process, or a specific type of material with that designation. Without further context, the exact meaning of 55D remains ambiguous. Its application is broad, and its specific identity is determined by the industry or field in which it is used.