Overview
Ricoh GXR
The innovative camera system.
GXR is a new camera system that consists of a body and
camera units. Each camera unit contains a lens (focal lengths differ between
units), an image sensor of optimum type and size for the unit, and an image
processing engine. By changing units, the photographer can handle a diverse
range of scenes in a way that satisfies sophisticated requirements for photo
expression. The slide mechanism adopted for attaching and removing camera units
enables changes to be made quickly and securely.
Compact, high-performance lens
design.
It is the lens that gives life to the photograph. In
interchangeable lens camera systems up to now, the distance from the mount and
the back of the lens to the sensor image plane was subject to requirements for
flange back distance and back focal length. This made it difficult to achieve
both compactness and high optical performance. Eliminating the lens mount,
however, means that the back focal length can be freely defined for the GXR, enabling
the new system to use the most optically efficient lens designs and giving it
excellent potential for future expansion. This practical concept has given
birth to camera units that achieve compact size without compromising image
quality.
Optimum tuning to realize all the
capabilities of the lens and the image sensor
In order to
make the best use of the inherent power of the lens and the image sensor, the
ideal solution is to combine both in a single unit. Consider, for example, the
low-pass filter covering the surface of the image sensor. The dilemma faced is
that while the filter helps prevent colour noise and colour moiré, increasing
this benefit results in an ever greater sacrifice in lens resolution.
Traditional interchangeable lens systems use a single low-pass filter for all
lenses so they are unable to avoid situations where the filter effect is
excessive or inadequate. With the GXR, on the other hand, we can design a
filter optimized for the resolution of the specific lens. In this way, Ricoh has
succeeded in effectively preventing colour noise while suppressing filter
influence on lens resolution.
Highly airtight system for superior
dust proofing
The ease with which dust can adhere to image sensors has
been a system problem for interchangeable lens digital cameras up to now. In
the case of GXR camera units, however, the lens and the image sensor are
integrated into a single unit. This structure makes it difficult for dust to
get in since it is not necessary to expose the inside of the camera when
changing lenses. In addition, the inside of the units are highly airtight with
light-shielded walls. Even in highly dusty shooting environments, camera units
can be changed without hesitation.
Slide mechanism for high precision
and reliability
In a relationship
similar to that of an SLR and its lens mount, the guide rail is a defining
characteristic of the GXR system. In order to create a highly reliable slide
mechanism, stainless steel with superior strength and corrosion resistance was
adopted for the rails. Surface hardness and wear resistance were further
enhanced with a soft-nitriding process, the end result being a high-precision
slide that enables secure attachment and removal. The combination of the slide,
the resin components, and the pressure-welded springs give an appropriate
sliding feel and quietness. In the development, high-stress attachment/removal
testing was done to verify the reliability of both mechanical and electrical
connections.
Magnesium alloy exterior
Both the
body and the camera units utilize a magnesium alloy exterior. Light, strong,
and exhibiting superior precision-molding, heat-dissipation, and
magnetic-shielding characteristics, magnesium alloy is an ideal material for
digital cameras. With a non-slip "pear-skin" baked finish for both
corrosion resistance and a high-class feel, the GXR exterior achieves
durability, reliability, and high-class impression.
Specifications
GXR External Body
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Flash
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Mode
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Auto (flash fires when lighting is poor or subject is
backlit), red-eye, on, slow sync, manual, off
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Range (built-in flash)
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Refer to
camera unit specifications.
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Flash compensation
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±2.0 EV in increments of 1/2EV or 1/3EV
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Manual flash amount
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FULL, 1/1.4, 1/2, 1/2.8, 1/4, 1/5.6, 1/8, 1/11, 1/16,
1/22, 1/32, 1/64
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Picture display
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3.0" transparent LCD; approx. 920,000 pixels
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Shooting mode
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Auto, program shift, aperture priority, shutter priority,
manual, scene (movie, portrait, sports, landscape, nightscape, skew
correction), " My Settings"
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Picture quality
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Fine, Normal, RAW (DNG) *1
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Storage
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SD/SDHC memory card, internal memory (approx. 86 MB)
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File size
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Refer to camera unit specifications.
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File format
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Photographs
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JPEG (Exif Ver. 2.21) *2, RAW (DNG)
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Movies
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AVI *3(Open DML Motion JPEG compliant)
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Compression
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JPEG baseline compliant (photographs and movies)
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Other shooting options
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Continuous shooting (continuous, M-Cont Plus); self-timer
(shutter release delay of approx. 10 s or 2 s, or custom setting); interval
timer (intervals of 5 s to 1 hour in increments of 5 s)*4 color
bracketing; B&W (TE); color space selection; noise reduction; histogram
display; framing grid; depth-of-field indicator; tilt indicator; hot shoe
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Other playback options
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Auto image rotation (when camera unit attached);
multi-frame playback; playback zoom (up to 16x); resize
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Interface
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USB 2.0 (High-Speed) Mini-B connector; Mass Storage *5;
AV output (NTSC), HDMI connector (Mini HDMI Type C)
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Video signal format
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NTSC, PAL
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Power source
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DB-90 rechargeable battery (3.6V)
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Battery life
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Refer to camera unit specifications.
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Dimensions (W x H x D)
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113.9 mm x 70.2 mm x 37.5 mm (excluding projections)
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Weight
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Camera body (excluding battery, memory card, neck strap,
and connector cap): 160 g
Battery, neck strap, and connector cap: 66 g
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Tripod screw hole
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1/4-20UNC
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Operating temperature
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0 °C to 40 °C
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Date storage time
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Approx. 1 week
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Operating humidity
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85% or less
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Storage temperature
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-20 °C to 60 °C
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1 A JPEG file is also recorded (the
JPEG file may be a fine or normal quality file with the same dimensions as the
RAW file or a VGA file). RAW files use the standard DNG format promoted by
Adobe Systems Incorporated.
2 Compatible with the Design rule for Camera
File system (DCF, a JEITA standard) and DPOF.
Full compatibility with other
devices is not guaranteed.
3 Audio: PCM 32 kHz, 16 bit monaural.
4 Flash off.
5 Mass Storage is supported under
Windows 2000, Windows XP, Windows Vista®, Windows® 7, and
Mac OS 9.0-9.2.2, Mac OS X 10.1.2-10.6.4.
Overview
GR A12 50mm f2.5 MACRO Lens
This lens gives a natural visual field with an angle of view
nearly the same as the human eye. The 50 mm focal length is one of the most
basic for candid photography. Compared to a wide-angle lens, a suitable
distance is maintained from the subject, and the photographer is able to chat
with the subject and elicit natural expressions to capture the person in a
candid way without undue attention being paid to the camera. GR LENS A12 50 mm
is also a macro lens. The photographer can enjoy close-up photography to a
maximum magnification of 1/2x and, from a wide open aperture setting, obtain
images with excellent sharpness and high contrast and resolution to the edge.
The lens configuration is 8 groups and 9 elements. As a standard macro
lens, there is nothing particularly unusual about this configuration, but
making good use of the new system's advantage of not having to accommodate back
focal length, we were able to design the refractive capabilities of each
element in a more efficient and practical manner. Partly thanks to the use of a
large-diameter aspherical element, this lens achieves a superior level of
edge-to-edge resolution and image quality unimaginable for its small size. In
addition, there is little vignetting so richly luminous, natural-form bokeh
extends to the edge. The floating structure corrects various types of
aberrations that tend to occur in close-up photography. Even at the minimum
shooting distance, this lens gives excellent definition and sharpness.
Even
with the focal length unchanged, the larger the image
sensor, the richer the bokeh that can be obtained. A
23.6 mm × 15.7 mm CMOS sensor enables the lens to make full use of the
lens' superior optical performance. With the low level of colour and
frame aberrations
even near the edge of the image, refined bokeh can be enjoyed with the
aperture
wide open, and stopping down gives comfortably crisp resolution. In
addition,
the wide dynamic range and resolving power of the approximately 12.30
million effective
pixels enhance the reproducibility of details and delicate tonal
nuances. The
result is high image quality that is more than adequate for
large-format
prints.
Close-up photography
at a maximum magnification of 1/2x is possible. Making good use of this
magnification ratio, the photographer can enjoy greater freedom in creative
close-up shots, moving back a bit to light the subject so it is not in the
camera's shadow. The minimum shooting distance is approximately 7 cm from the
front of the lens.
HD movie image size is 1280×720, aspect ratio 16:9, and frame
rate 24 frames/second. Utilizing the high sensitivity (maximum ISO 3200) and
the bokeh enabled by the F2.5 aperture and the large image sensor, it is
possible to create impressive movies with a different feel than those of
standard video cameras. The GXR body has an HDMI connector, and for
large-screen viewing of the movies shot, the GXR can be connected to TVs
supporting HDMI.
Specifications
GR A12 50mm f2.5 MACRO Lens
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Effective pixels
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Approximately 12.3 million
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Image sensor
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23.6 mm x 15.7 mm CMOS (total pixels: approx. 12.9
million)
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Lens
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Focal length
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33 mm (35 mm format equivalent: 50mm)
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Aperture (f-number)
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f/2.5 - f/22 (ND filter used for apertures
of f/22 in auto shooting mode)
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Focus range (from lens)
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Normal shooting: Approx. 30 cm - infinity
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Macro shooting: Approx. 7 cm - infinity (maximum
magnification 1/2x)
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Construction
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9 elements in 8 groups (1 aspherical lens element with 2 surfaces)
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Filter size
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40.5 mm
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Zoom
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4.0x digital zoom (3.6x for movies)
5.9x auto resize zoom (VGA)
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Focus mode
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Contrast AF-based multi and spot AF; MF; Snap; infinity
(focus lock and AF-assist)
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Shutter speed
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Photographs
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180 - 1/3200 s (upper and lower limits vary according to
shooting and flash mode)
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Movies
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1/30 - 1/2000 s
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Exposure control
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Metering
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TTL-CCD metering in multi (256-segment), center-weighted,
and spot modes with autoexposure lock
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Mode
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Program AE, aperture priority AE, manual exposure, shutter
priority AE, move target function
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Exposure Compensation
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Manual (+4.0 to -4.0 EV in increments 1/3 EV or 1/2 EV),
auto bracketing (-2 EV to +2 EV in increments 1/3 EV or 1/2 EV)
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ISO sensitivity (Standard Output Sensitivity)
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AUTO, AUTO-HI, ISO200/ISO400/ISO800/ISO1600/ISO3200
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White balance
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Auto / Multi-P AUTO / Outdoors / Cloudy / Incandescent
Lamp / Fluorescent Lamp / Manual Settings / Detail; white balance Bracketing
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Flash
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Range (built-in flash)
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Approx. 20 cm - 3.0 m (ISO auto)
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Shooting mode
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Auto / program shift / aperture priority / shutter
priority / manual /scene (movie, portrait, sports, landscape, nightscape,
skew correction) / "My Settings"
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Continuous mode
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Number of pictures shot in Continuous (Picture Size: RAW)
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Noise Reduction off or on (Weak): 4 pictures
Noise Reduction on (Strong): 3 pictures
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Number of pictures shot in M-Cont Plus (1 set)
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HI (1280 x 854): 30 pictures (24 Frames/Sec)
LO (4228 x 2848): 15 pictures (3 Frames/Sec)
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Picture quality *1
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FINE, NORMAL, RAW (DNG) *2
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Image size (pixels)
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Photographs
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16:9
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4288 x 2416, 3456 x 1944
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4:3
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3776 x 2832, 3072 x 2304, 2592 x 1944, 2048 x 1536, 1280 x
960, 640 x 480
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3:2
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4288 x 2848, 3456 x 2304
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1:1
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2848 x 2848, 2304 x 2304
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Movies *3(24 Frames/Sec)
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1280 x 720, 640 x 480, 320 x 240
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File size (approx.)
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RAW
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16:9
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NORMAL: 17,800 KB/frame, FINE: 19,515 KB/frame, VGA:
15,587 KB/frame
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4:3
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NORMAL: 18,387 KB/frame, FINE: 20,157 KB/frame, VGA:
16,124 KB/frame
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3:2
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NORMAL: 20,946 KB/frame, FINE: 22,967 KB/frame, VGA:
18,337 KB/frame
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1:1
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NORMAL: 13,991 KB/frame, FINE: 15,333 KB/frame, VGA:
12,273 KB/frame
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L
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16:9
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NORMAL: 2,222 KB/frame, FINE: 3,816 KB/frame
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4:3
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NORMAL: 2,315 KB/frame, FINE: 3,960 KB/frame
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3:2
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NORMAL: 2,615 KB/frame, FINE: 4,493 KB/frame
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1:1
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NORMAL: 1,761 KB/frame, FINE: 3,009 KB/frame
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M
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16:9
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NORMAL: 1,475 KB/frame, FINE: 2,509 KB/frame
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4:3
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NORMAL: 1,574 KB/frame, FINE: 2,662 KB/frame
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3:2
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NORMAL: 1,744 KB/frame, FINE: 2,968 KB/frame
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1:1
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NORMAL: 1,186 KB/frame, FINE: 2,003 KB/frame
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5M
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4:3
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FINE: 2,287 KB/frame
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3M
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4:3
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FINE: 1,474 KB/frame
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1M
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4:3
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FINE: 812 KB/frame
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VGA
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4:3
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FINE: 197 KB/frame
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Battery life
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Based on CIPA standard, DB-90: approx. 320 shots *4
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Dimensions (W x H x D)
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Camera unit only: 68.7 mm x 57.9 mm x 71.3 mm (including
the lens barrel; Excluding the connector)
When mounted on the camera body: 113.9 mm x 70.2 mm x
77.1 mm (including the lens barrel)
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Weight (approx.)
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Camera unit only: 263 g (not including the lens cap or
Connector cap)
When mounted on the camera body: 423 g (not including
the Battery, memory card, neck strap,
connector cap, or lens cap)
|
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Operating temperature
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0 °C to 40 °C
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Operating humidity
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85% or less
|
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Storage temperature
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-20 °C to 60 °C
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1 The picture quality modes which can be set
vary depending on the image size.
2 A JPEG file is also recorded (the JPEG file
may be a FINE- or NORMAL-quality file with the same dimensions as the RAW file
or a VGA file 640 × 480 pixels in size). RAW files use the standard DNG format
promoted by Adobe Systems Incorporated.
3 When shooting movies of 1280×720 size, the use
of an SD/SDHC memory card with an SD speed class of Class 6 or higher is
recommended.
4 For reference only; actual number of shots
varies greatly according to how camera is used. We recommend that you carry
spare batteries when in use for extended periods. (Shooting capacity was
measured using CIPA-standard parameters. These are only estimates; performance
may vary
depending on usage conditions.)
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