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Ricoh

Ricoh GXR Mount A12 for Leica M Lenses

SKU: IRCLM MFR: 170613
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About the Ricoh A12

The new GXR MOUNT A12 is a lens mount unit made especially for the GXR. Featuring an APS-C size CMOS sensor and a newly developed focal plane shutter, this unit makes it possible to mount lenses such as Leica M lenses, and it provides various types of compensation and correction functions

• The newly adopted APS-C size CMOS sensor expands possibilities for high resolution and imaging power
The adoption of a CMOS sensor with an optimized micro lens layout makes it possible to secure sufficient brightness levels even in the peripheral areas of the image.
The CMOS sensor used is 23.6mm × 15.7mm (APS-C size). It enables the shooting ofhigh-quality images with smooth tone gradations as well as high definition and low noise.

• Compatibility with a wide variety of lenses, including Leica M mount lenses.
Compatible with the Leica M mount, GXR MOUNT A12 can, of course, handle M-mount lenses, and if a conversion adapter is used many more types of mounts can also be accommodated.
A checking device is included for use in confirming whether or not your lenses are physically compatible.

• Diverse new functions maximize the potential of the lens itself
In order to accommodate the photographer's own preferences by adjusting for the distinctive characteristics of many different lenses, GXR MOUNT A12 can independently correct coloring at the corners. Color shading correction is possible in a -4 to +4 range for both R and B.
Peripheral illumination correction is possible in a -3 to +3 range.
A distortion correction function is provided to correct for the distortion that tends to occur in the lens periphery. The photographer can select barrel and pincushion distortion and specify "strong," "medium," or "weak" for each.
A glass optical filter was adopted and made as thin as possible. It increases periphery image quality and suppresses field curvature.

• High-precision focusing
A focus-assist function has been included in an effort to raise the accuracy of manual focusing. The photographer can select from two modes and check the focus by strengthening outlines and contrast.
Magnifying the screen image while shooting is an effective technique for focusing. The magnification can be done not only in the center but throughout the image. In addition, the image quality for 4x and 8x magnification has been further enhanced. The area to be magnified can be moved using the directional pad.

• Two shutter methods are featured: newly developed focal plane shutter and electronic shutter
With the focal plane shutter, settings of 1/4000 sec. to 180 sec. are possible.
With the electronic shutter, settings of 1/8000 sec. to 1 sec. are possible, and the photographer can shoot without worrying about shutter noise and vibration.

• The wide range of functionality that characterizes the GXR series
My Settings enables a wide range of shooting functions to be specified in an instant. For the setting information storage, six patterns can now be stored in the body's My Settings Box and six patterns can be stored in the SD card. This, along with the ability to change shooting conditions, further expands the photographer's world of photo expression.
In manual exposure mode, the shutter speeds B (bulb) and T (time) can be selected. With B, the exposure continues while the shutter release button is pressed, and with T, the shutter release button is pressed to start and end the exposure. For both B and T, the exposure is automatically ended when 180 seconds have elapsed.
Information on the lens used can be put in the EXIF information. In the editing of My Settings information, lens name, focal length, and F value can be entered.
New scene mode options have been added for the easy enjoyment of a wide range of photo expression. The five new options are soft focus, cross process, toy camera, miniaturize, and high contrast B&W. The photographer can create a unique image by just pressing the shutter release button.
An electronic level utilizing an acceleration sensor.
An image flag function to enable the quick display of specific images from among those in the camera. Up to 20 images can be flagged.
For the exterior, we utilized die cast magnesium, which has a strong track record in the GR series, and we covered the surface with a corrosion-resistant "pear-skin" coating. The end result is a body with durability, light weight, and a superior feel in hand.
It is possible to shoot 1280 × 720 pixel HD movies.
* Note: 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.



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Product Review: The Ricoh GXR System, Expanded and Revisited

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Ricoh A12 Specifications

Effective Pixels Approximately 12.3 million
Image Sensor 23.6 mm × 15.7 mm CMOS (total pixels: approx. 12.9 million)
Digital Zoom 4.0× digital zoom (3.6x for movies), 5.9× auto resize zoom (VGA)
Focus Mode Manual Focus
Shutter Speeds Photographs: 1/4000 - 180 s, bulb, time (upper and lower limits vary according to shooting and flash modes)
Maximum flash sync shutter speed: 1/180 s
Movies: 1/2000 - 1/30 s
Exposure Control: Metering TTL-CCD metering in multi (256-segment), center-weighted, and spot modes with autoexposure lock
Exposure Control: Mode Aperture priority AE, manual exposure
Exposure Compensation 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)
ISO sensitivity Auto, Auto-Hi, ISO-Lo, ISO 200, ISO 250, ISO 320, ISO 400, ISO 500, ISO 640, ISO800, ISO 1000, ISO 1250, ISO 1600, ISO 2000, ISO 2500, ISO 3200
White Balance Auto / Multi-P AUTO / Outdoors / Cloudy / Incandescent Lamp 1 / Incandescent Lamp 2 / Fluorescent Lamp / Manual Settings / Detail; white balance bracketing
Flash Method: TTL, manual, external auto (external flash GF-1 function)
Flash mode: Auto, Anti Red-eye, Flash On, Flash Synchro, Manual, Flash Off
Guide number: 9.6 (ISO 200 equivalent), 6.8 (ISO 100 equivalent)
Illumination angle: 24 mm (35 mm film camera equivalent)
Firing timing: 1st/2nd curtain sync
Other: External
Shooting Mode Auto / Program Shift / Aperture Priority / Shutter Priority / Manual / Scene (Movie, Portrait, Sports, Landscape, Nightscape, Skew Correction, Miniaturize, High Contrast B&W, Soft Focus, Cross Process, Toy Camera, Electronic Shutter) / My Settings
Continuous Mode Number of pictures shot in Continuous (Picture Size: RAW): Noise Reduction off or on (Weak): 4 pictures, Noise Reduction on (Strong): 3 pictures
Number of pictures shot in M-Cont Plus (1 set):
HI (1280 × 856): 30 pictures (24 frames/sec.)
LO (4288 × 2848): 15 pictures (2.2 frames/sec.)
Picture Quality FINE, NORMAL, RAW (DNG)
Image Size (Pixels) 16:9 4288×2416, 3456×1944
4:3 3776×2832, 3072×2304, 2592×1944, 2048×1536, 1280×960, 640×480
3:2 4288×2848, 3456×2304
1:1 2848×2848, 2304×2304
Battery Life Based on CIPA standard, DB-90: approx. 330 shots
Dimensions (W × H × D) Lens mount unit only: 3.1 x 2.4 x 1.6" / 79.1 mm × 60.9 mm × 40.5 mm (according to CIPA guidelines)
When mounted on the GXR body: 120.0 mm × 70.2 mm × 45.7 mm (according to CIPA guidelines?
Weight Lens mount unit only: Approx. 6 oz / 170 g
When mounted on camera body: Approx. 13 oz /370 g (battery and SD memory card included)
Operating Enviroment Operating temperature: 0 °C to 40 °C
Operating humidity: 85% or less
Storage temperature: -20 °C to 60 °C
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