Photos: Sony's new flagship SLR

Sony announced its forthcoming "flagship" Alpha-branded SLR on Thursday at the Photo Marketing Association trade show in Las Vegas.

Its chief defining feature so far is its use of a 24.8-megapixel sensor that's unusually large--the size of a full frame of 35mm film. That move makes Sony only the third digital SLR (single-lens reflex) maker, along with Canon and more recently Nikon, to aim for that part of the market. Sony's flagship is geared toward advanced amateurs, but Sony hopes professional photographers will like it, too. The camera is scheduled to go on sale later this year.