Sigma's SD1 Merrill DSLR is the company's SD1 DSLR, renamed to honor the great Richard "Dick" Merrill, the co-creator of Foveon X3 Direct Image Sensor technology. The most outstanding feature of the SD1 Merrill is this APS-C sized X3 CMOS sensor, which uses three layers of 4800 x 3200 pixels to produce a 46MP full color sensor. Using the True II image processing software, the SD1 Merrill delivers high-resolution images processed quickly with high definition and a smooth and subtle graduation of color. RAW file sizes range up to 45MB. These impressive features are housed in a lightweight weather-resistant solid magnesium-alloy body built to take the bumps and shocks of the real world. A pentaprism viewfinder and a high-resolution (460,000 dots) LCD monitor give you options for composing, focusing and reviewing your images. A panoply of features include shutter speeds up to 1/8000 sec., seven different color modes, continuous shooting at up to 6 fps, a built-in pop-up flash, and sensitivity up to 6400 ISO. The SD1 Merrill has a 1.5x crop factor (compared to 35 mm or full-frame cameras). Sigma SA mount lenses are compatible with the SD1 Merrill. Sigma SD1 Merrill Specs Imaging Lens Mount Sigma SA Camera Format APS-C (1.5x Crop Factor) Pixels Effective: 46 Megapixel Maximum Resolution 4800 x 3200 Aspect Ratio 4:3 Sensor Type CMOS Sensor Size 23.5 x 15.7 mm Image File Format JPEG, Raw Bit Depth 12-Bit Image Stabilization None Exposure Control ISO Sensitivity 100 to 6400 Shutter Speed 1/8000 to 30 Seconds Bulb Mode Metering Method Center-Weighted Average, Multi-Zone, Spot Exposure Modes Aperture Priority, Manual, Program, Shutter Priority Exposure Compensation -3 to +3 EV (1/3 EV Steps) White Balance Auto, Flash, Fluorescent, Incandescent, Manual, Overcast, Shade Focus Focus Type Auto and Manual Focus Focus Mode Continuous-Servo AF (C), Manual Focus (M), Single-Servo AF (S) Autofocus Sensitivity 0 to +18 EV Viewfinder and Monitor Viewfinder Type Optical (Pentaprism) Viewfinder Coverage 98% Viewfinder Magnification Approx. 0.95x Diopter Adjustment -3 to +1.5 Monitor Size 3" Monitor Resolution 460,000 Dot Monitor Type Fixed LCD Flash Built-In Flash Yes Flash Modes Flash On Maximum Sync Speed 1/180 Second External Flash Connection Hot Shoe Interface Memory Card Slot Single Slot: CompactFlash Connectivity USB Mini-B (USB 2.0) Wireless None GPS No Physical Battery 1 x BP-21 Rechargeable Lithium-Ion Dimensions (W x H x D) 5.7 x 4.4 x 3.1" / 14.5 x 11.2 x 7.9 cm Weight 24.7 oz / 700.2 g (Body Only)