In 2009, Ricoh released the GXR, a unique camera which allows its owner to interchange modular lens mounts, sensors and processor units. While it might invoke the Theseus paradox, it has allowed shooters an unparalleled amount of flexibility with their cameras. The newest unit is the GXR MOUNT A12, which adds a Leica M-mount to the camera, allowing you to add some of the best rangefinder glass on the planet to your GXR — not to mention older lenses by Konica, Minolta, Voigtländer, Rollei and Carl Zeiss.
The A12 has a built-in 12MP CMOS sensor, can handle ISO 200-3200, record 720p video, and both electronic and physical shutters, available in different speed ranges. In order to account for the preferences of the individual photographer and lens, the unit also allows color correction independently for each corner, peripheral illumination, and distortion correction.
The mount will be available in black only for $649, and in limited numbers with only 3,000 produced per month. We've culled a list of features from the press release, and they're included after the fold.
Main features of GXR MOUNT A121) 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 of high-quality images with smooth tone gradations as well as high definition and low noise.2) 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.3) Diverse new functions maximize the potential of the lens itselfIn 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.4) High-precision focusingA 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.5) Two shutter methods are featured: newly developed focal plane shutter and electronic shutterWith 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 vibration6) The wide range of functionality that characterizes the GXR seriesMy 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.7) New options addedWe have created the new soft cases SC-75B and SC-75T, which are easy to open and close. With SC-75B, it is possible to shoot with the case attached to the GXR body.