Ricoh GXR

The Ricoh GXR is a compact digital camera first announced by Ricoh Company, Ltd, Tokyo on November 10, 2009.[1] Unlike conventional cameras which either have a fixed lens and sensor or interchangeable lens and a fixed sensor, the GXR takes interchangeable units, each housing a lens, sensor and image processing engine. This allows each unit to have these features optimised to one another and a specific task, whereas with conventional interchangeable lens cameras, each different lens must use the same sensor and engine. The sealed units also prevent dust from reaching the sensor, which can be a problem with other cameras where the sensor is exposed whilst a lens is being changed. A significant disadvantage of this system is the extra cost involved in having to buy a whole new sensor with every new lens.

Ricoh GXR
Ricoh GXR: body with A12 macro lens and VF-2 viewfinder mounted, and S10 24-72 mm equivalent lens on the side
Overview
MakerRicoh
TypeInterchangeable lens/sensor
Lens
Lens mountRicoh GXR lens/sensor
Sensor/medium
Sensor typeVaries (CCD in S10; CMOS in P10, A12 and A16 modules)
Sensor sizeVaries (1/2.3" in P10, 1/1.7" in S10, APS-C in A12 and A16)
Maximum resolutionVaries (10MP in P10 and S10; 12MP in A12; 16MP in A16)
Recording mediumSD/SDHC
Focusing
FocusAutomatic
Shutter
Shutterleaf (A12, A16, P10, S10) or focal plane (GXR Mount)
Image processing
Image processorVaries (GR ENGINE III or Smooth Imaging Engine IV)
General
LCD screen3 inches (7.6 cm); 920,000 pixels
BatteryRicoh DB-90 3.6V
AV Port(s)HDMI, USB
Body featuresmagnesium alloy
Dimensions113.9 by 70.2 by 37.5 millimetres (4.5 in × 2.8 in × 1.5 in) (body only, excluding projections)
Weight160 grams (6 oz) (body only, excluding battery, memory card, strap)
References
"GXR: Specifications". Ricoh Global. 2016. Retrieved 20 June 2016.

The body holds a built-in pop-up flash as well as a hot shoe on top for an external flash unit. Alternatively, Ricoh's 'VF-2', an external electronic viewfinder, can be attached to the hot shoe which, offers 920,000 pixels and 100% field of view.[2] The separate units slide onto the body via a stainless steel rail and lock into place. They can then be released by a lever on the camera's body. Both the body and lens unit use magnesium alloy exterior.[3] Each lens unit has its own unique specifications relating to its sensor and optics, meaning that different lens units will change the features, behavior and performance of the camera body to varying degrees when attached.

Units
Ricoh GXR: body, A12 macro lens, and P10 28-300 mm equivalent lens
Interchangeable Module Specifications[4][5]
  A12 28mm A12 50mm A16 24-85mm P10 S10 GXR Mount (Leica M)
Unit Name GR LENS A12 28mm F2.5 GR LENS A12 50mm F2.5 MACRO RICOH LENS A16 24-85mm F3.5-5.5 RICOH LENS P10 28-300mm F3.5-5.6 VC RICOH LENS S10 24-72mm F2.5-4.4 VC GXR MOUNT A12
Million Pixels (Effective/Total) 12.3/12.9 16.2/16.5 10.0/10.6 10.0/10.4 12.3/12.9
Image Sensor CMOS, APS-C
(23.6 mm × 15.7 mm (0.9 in × 0.6 in))		 CMOS, 1/2.3" CCD, 1/1.7" CMOS, APS-C
Focal Length (35mm equivalent) f=18.3mm (28mm) f=33mm (50mm) f=15.7~55.7mm (24~85mm) f=4.9~52.5mm (28~300mm) f=5.1~15.3mm (24~72mm)
4.0mm (19mm) with DW-6
28.8mm (135mm) with TC-1		 varies
Max. Aperture F:2.5 F:2.5 F:3.5 (wide)
F:5.5 (tele)		 F:3.5 (wide)
F:5.6 (tele)		 F:2.5 (wide)
F:4.4 (tele)		 varies
Min. Aperture F:22 F:22 F:22 F:7.0 (wide)
F:15.4 (tele)		 F:9.1 (wide)
F:15.8 (tele)		 varies
Min. Focusing Dist. 20 cm (0.7 ft) 7 cm (0.2 ft) 25 cm (0.8 ft) 1 cm (0.03 ft) (wide)
27 cm (0.9 ft) (tele)		 1 cm (0.03 ft) (wide)
4 cm (0.1 ft) (tele)		 varies
Lens Construction (Elements/Groups) 9E/6G (2 aspherical with 2 surfaces) 9E/8G (1 asph with 2 surfaces) 11E/9G (3 asph with 6 surfaces) 10E/7G (4 asph with 5 surfaces) 11E/7G (4 asph with 4 surfaces) varies
Filter Thread 40.5mm 40.5mm 55mm no 43mm
(with HA-3)		 varies
Imaging Engine GR ENGINE III Smooth Imaging Engine IV Smooth Imaging Engine IV?
Dimensions 68.7 mm × 57.9 mm × 50.4 mm (2.7 in × 2.3 in × 2.0 in) 68.7 mm × 57.9 mm × 71.3 mm (2.7 in × 2.3 in × 2.8 in) 71.4 mm × 70.5 mm × 93.3 mm (2.8 in × 2.8 in × 3.7 in) 68.7 mm × 57.9 mm × 44 mm (2.7 in × 2.3 in × 1.7 in) 68.7 mm × 57.9 mm × 38.6 mm (2.7 in × 2.3 in × 1.5 in) 79.1 mm × 60.9 mm × 40.5 mm (3.1 in × 2.4 in × 1.6 in)
(flange-back distance: 27.8 mm (1.1 in))
Weight 210 g (7.4 oz) 263 g (9.3 oz) 350 g (12.3 oz) 160 g (5.6 oz) 161 g (5.7 oz) 170 g (6.0 oz)

Camera units
RICOH LENS P10 28-300mm F3.5-5.6 VC[6]
  • 10.6 megapixel, 1/2.3" CMOS sensor
  • 28–300 mm (expressed as 35 mm equivalent) f/3.5-5.6 VC lens
  • GR engine "Smooth Imaging Engine IV"
  • Manual and auto focus
  • Movie mode up to 1280 x 720 at 30 frames per second
GR LENS A12 50mm F2.5 MACRO
  • 12.30 megapixel, APS-C sized (23.6×15.7 mm) CMOS sensor
  • 50 mm (expressed as 35 mm equivalent) f/2.5 GR lens
  • GR engine III
  • Manual and auto focus
RICOH LENS S10 24-72mm F2.5-4.4 VC
  • 10 megapixel, 1/1.7" CCD Sensor
  • 24–72 mm (expressed as 35 mm equivalent) f/2.5-4.4, 3× Ricoh zoom lens
  • Smooth Imaging engine IV
GR LENS A12 28mm F2.5
  • 12.30 megapixel, APS-C sized (23.6×15.7 mm) CMOS sensor
  • 28 mm (expressed as 35 mm equivalent) f/2.5 GR lens
  • GR engine III
  • Manual and auto focus
GR LENS A16 24-85mm F3.5-5.5
  • 11 elements in 9 groups (3 aspherical lens elements with 6 surfaces)
  • 55mm filter thread
  • 16.20 megapixel, APS-C sized (23.6×15.7 mm) CMOS sensor
  • Smooth Imaging engine IV
  • Manual and auto focus

Lens mount units
GR MOUNT A12

See also

References
  1. "Ricoh announces the GXR interchangeable unit camera system" (Press release). Ricoh Company, Ltd. 2009-11-10. Archived from the original on January 24, 2010. Retrieved 2010-03-07. Tokyo, Japan, November 10, 2009—Ricoh Co., Ltd. (president and CEO: Shiro Kondo) today announced the development and release of the GXR interchangeable unit camera system
  2. "GXR: System diagram". Ricoh Imaging Company, Ltd. 2016. Retrieved 20 June 2016.
  3. "GXR: New System Features". Ricoh Imaging Company, Ltd. 2016. Retrieved 20 June 2016.
  4. "What is the difference between GXR A16 24-85mm, A12 28mm, and A12 50mm?". Ricoh Imaging Company, Ltd. 2016. Retrieved 20 June 2016.
  5. "What is the difference between GXR P10 28-300mm, S10 24-72mm, and A12 50mm?". Ricoh Imaging Company, Ltd. 2016. Retrieved 20 June 2016.
  6. "Ricoh Lens P10" (Press release). Ricoh Company, Ltd. Retrieved 2010-05-07.
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