4.64 Megapixels	SIGMA SA bayonet	3.0 inch LCD

Few details on the Sigma SD15 are currently available. Intended to replace the existing SD14 model, the Sigma SD15 will retain the same 0.98" (24.9mm) diagonal Foveon X3 image sensor with 14.1 million 7.8µm photodiodes, which is capable of measuring full RGB color information at every pixel location. The Sigma SD15 will hence output a 4.64 megapixel maximum uninterpolated image size. The SD15 will mark the debut of Sigma's TRUE II ("Three-layer Responsive Ultimate Engine") image processor in an SD-series camera body, with the original TRUE processor having featured only in the DP1 compact camera. Previous SD-series DSLRs have featured an unbranded image processor. The Sigma TRUE II processor is said to offer improvements in processing speed, operation, and performance, and will be shared with the new DP2 compact camera.

Other changes will include a new 3.0" LCD display, and some restyling of the camera's rear panel controls. Expected pricing and availability have not been announced at this time.