luminous-landscape.com reviews the Leica S2 and writes:
“There is an elegant simplicity to the S2′s body. The top panel has just a shutter speed dial, a shutter release and a small status LCD. Well, actually it’s an OLED, and is a remarkable bit of eye candy. It is the brightest and clearest screen that I’ve ever seen in medium to low light levels. Unfortunately in direct sunlight it washes out and becomes almost unreadable, forcing one to shade it with ones body or hand. Leica is aware of the issue and is looking at how it might be improved.”

juzaphoto reviews the Leica S2 and writes:
“The Leica S2 is one of the most interesting cameras I have tried: it combines amazing image quality with a camera body much more responsive than the majority of medium format cameras. Its sensor is not as big as the sensor of the Hasselblad H4D, but it is way bigger than 35mm FF sensors; another nice thing about the Leica S2 sensor is that it has 3:2 ratio, instead of the 4:3 ratio of the majority of MF cameras (this is a matter of personal taste, for me the 3:2 ratio is more pleasing).”

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pdngearguide reviews the Leica S2 and writes:
“As expected from most Leica products, the S2 is bank-vault solid. Built almost entirely of metal – with some exterior rubber as mentioned before – the S2 feels like it could handle a couple of significant drops and keep on clicking.”

photographyblog reviews the Leica S2 and writes:
“The S2 definitely lives up to its DSLR-like billing though, being surprisingly light and portable, certainly no heavier or more cumbersome than a Nikon / Canon pro DSLR.”

Specifications:

Image sensor:
• Low-noise Kodak CCD sensor
• 37.5 megapixels (7,500 x 5,000)
• 45 x 30 mm
• 6 µm pixel spacing
• 3:2 aspect ratio
• Dynamic range: 12 stops
• Color depth: 16 bits per pixel
• Low pass filter: none (moire suprresion using digital processing)

Sensitivity range:
• ISO 80 to 1250 (manual or automatic control)

Data storage (format):
• DNG (approx. 75 MB per image)
• JPEG (basic or fine)

Memory cards:
• Compact Flash (up to 64 GB)
• SD cards (HC)

Maximum frame rate:
• 1.5 images/s
• 1 GB buffer
• 8 images in a burst (DNG)

Control monitor:
• 3-inch TFT
• 460,000 pixels
• 16 million colors
• Cover glass: highly abrasion and scratch resistant sapphire glass (only with the LEICA S2-P)

Connections:
• High-speed USB 2.0 (robust connection with strain-relief, cable included
• HDMI
• Remote release
• X sync
• SCA3002

Exposure metering:
• Multi-field metering (5 fields)
• Center-weighted integral metering
• Spot metering (3.5%)

Exposure control:
• Program mode (with Shift function)
• Shutter priority, aperture priority, manual metering

Shutter:
• 1/500 s to 32 s, flash synch time: All speeds

Flash operation:
• Metering method: TTL (multi-field, center-weighted, spot)
• TTL-HSS rapid synchronization up to 1/4000 s with focal plane shutte,
• Fully compatible with LEICA SF 58 and devices with SCA3002 adapters

Auto Focus:
• Central crosshair sensor
• Focusing drive in lens

Operating Modes:
• AF Continuous
• AF Single
• MF (with override)

Viewfinder:
• High eye-point pentaprism viewfinder
• Coverage: 96%
• Magnification: 0.86x
• Diopter: -3 to +1
• Focusing screen: Matte with cross-hairs (interchangeable)

Power supply :
• Li-Ion battery
• 7.4 V, 2150 mAh

Body:
• Die-cast magnesium
• Resistant to dust and dripping/splashing water

Dimensions:
• 160 x 120 x 81 mm (6.3 x 4.7 x 3.2 in)

Weight (no lens):
• 1.4 kg (3.1 lb)

Supplied accessories:
• Software: Adobe Lightroom, Leica Image Shuttle
• Battery
• Charger
• USB cable