These are the original technical specifications for the Epson R-D1. See the initial press release as reported by dpreview.com.

Table 1. Epson R-D1 technical specifications
Epson part no. B31B167003CZ (R-D1)
Model type Interchangeable-lens digital rangefinder camera
Image sensor 23.7 × 15.6 mm CCD (APS-C size)
Image sensor resolution Total: 6.3 million pixels; effective: 6.1 million pixels
Image format/size Raw (12 bit): 3008 × 2000 pixels; JPEG: 3008 × 2000 pixels (high), 2240 × 1488 pixels (normal)
File format EXIF 2.21, DCF 2.0, DPOF 1.1, Print Image Matching 2.6
Storage media SD memory card (maximum size: 2 GB)
Viewfinder type Coupled coincident-image optical rangefinder (focus range: 0.7 m to infinity)
Viewfinder magnification 1.0×
Effective baseline length 38.2 mm
Viewfinder frame Bright frame switchable for 28/35/50 mm lenses, auto-parallax compensation
Viewfinder frame coverage 85% (at 3 m)
Viewfinder exposure display LED shutter speed display (AE and manual modes)
Lens mount EM mount (compatible with Leica M mount)
Equivalent 35 mm focal length 1.53 × lens focal length
Shutter Electronically controlled vertically running focal plane
Shutter speed Auto: 8 to 1/2000 second (stepless). Manual: 1 to 1/2000 second (1 EV steps), bulb
Flash synchronization X-contact, synchronization of 1/125 second or slower
Exposure metering system Centre-weighted TTL exposure metering
Exposure metering range EV 1 to 19 (ISO 100 equivalent)
Exposure control AE with aperture priority and manual operation
Exposure compensation –2.0 to +2.0 EV (1/3 EV increments), AE mode only
ISO sensitivity 200, 400, 800, 1600
White balance settings Auto or preset (sunlight, shade, cloudy, tungsten, fluorescent)
Custom ‘film’ settings Standard, 3 customisable ‘film’ settings (edge enhance, saturation, tint, contrast, NR)
Colour settings Colour, monochrome (in-built filters: standard, green, yellow, orange, red)
LCD 2.0″ TFT (235,000 pixels)
LCD information/settings Image playback: Single image or four thumbnails, zoom, slide show
Image information: Filename, date/time, image size, white balance, shutter speed, image quality setting, film setting, ISO sensitivity, colour mode
Image analysis: Histogram and overexposure indicator, composition framing guide
Delete function: Single image/all images/card format
File protection: Single-image/all-image protection and release
DPOF settings: Single image/all images (0 to 99 images)
Language settings: Japanese, English, German, French, Spanish, Italian, Dutch, Traditional Chinese
User-defined button: Choice of image deletion, image protection, zoom, print setting, file info, ‘film’ setting
Power save mode: 3, 5, 10, or 20 minutes
Needle calibration: For calibration of analogue dials
Sequence number: Sequential file-naming option
Time and date setting: Alter time and date, date format options
Analogue information dials Image quality, white balance, shots remaining, battery life
Tripod socket 1/4″ (conforms to ISO 1222)
Accessory shoe Synchronisation contact (conforms to ISO 512)
Shutter cable release Standard thread (3.5 × 0.5 mm)
Size (w × h × d) 142.0 × 88.5 × 39.5 mm
Weight Without battery: 590 g; with battery: 620 g
Power source Lithium ion rechargeable battery
Usable temperature range 5 to 35˚ C
Usable humidity range 30% to 80% (camera not weatherproof)
Supplied accessories Battery, battery charger, neck strap, manual, power cable, body cap, Epson PhotoRAW software (Windows only), Epson RAW Plug-in (for Adobe Photoshop 7 and above and Adobe Photoshop Elements 2, compatible with Windows and Mac)