Sigma has just announced their Quattro SD and SD-H. These could be a real game changer.
The Sigma SD Quattro:
- Two mode Autofocus system
- Mirrorless system, Dust & Splash magnesium alloy body
- Resolution equal to 39MP Bayer sensor on resolution testing
- Compact design similar to dp Quattro cameras
- SA mount
The Sigma SD Quattro H:
- Larger APS-H sensor
- Resolution equal to 51MP Bayer sensor on resolution testing
- Designed to take advantage of SGV lenses with great IQ
- SA mount
Design Detail
Two new sd Quattro cameras
sd-Quattro
![](http://www.sigma-global.com/common/cameras/sd-series/index/images/sd-quattro_image.jpg)
Designed for the artist who loves photographyFeaturing the 39-megapixel-equivalent Foveon X3 Quattro direct image sensor, this camera optimally balances outstanding image quality with fundamental performance.Debuting in the new SIGMA dp Quattro series, the latest-generation Foveon X3 Quattro direct image sensor delivers superior resolution and expressive power. An APS-C size sensor, it offers 39-megapixel-equivalent resolution in combination with an optimal file size and efficient image processing speed. With its balanced performance, the SIGMA sd Quattro series sets a new standard for high-end cameras that leverage the capabilities of outstanding interchangeable lenses.
sd-Quattro H
![](http://www.sigma-global.com/common/cameras/sd-series/index/images/sd-quattro-h_image.jpg)
Ultra-high resolution from an amazingly high-performance cameraThe first camera to feature the newly developed APS-H size Foveon X3 Quattro direct image sensor—with incredible 51-megapixel-equivalent resolution.The SIGMA sd Quattro H features a Foveon X3 direct image sensor (generation name: Quattro) in an all-new bigger APS-H size. It has all the image quality of the Foveon X3 direct image sensor with even more resolution. In fact, the SIGMA sd Quattro H offers 51-megapixel-equivalent resolution—the highest among sensor sizes smaller than full-frame. This is the camera for those looking for even higher resolution form SIGMA’s direct image technology.
The essence of photographic expression: fine lenses for a truly powerful system camera.
The SIGMA GLOBAL VISION series of high-performances lenses comprises three distinct lines and concepts: Contemporary, Art, and Sports. SIGMA has developed each of the lenses in these three lines using the Foveon X3 direct image sensor to ensure their world-class optical performance. Offering the outstanding expression that photographers demand, the SIGMA sd Quattro series is a complete and powerful system compatible with these fine lenses.
![](http://www.sigma-global.com/common/cameras/sd-series/features/images/two-sensor-sizes_image.gif)
Two sensor sizes available The SIGMA sd Quattro incorporates an APS-C size sensor for outstanding medium format level image quality, while the SIGMA sd Quattro H features a new APS-H size sensor for 51 megapixel-equivalent ultra-high image quality.
Other cameras typically use a single-layer photo sensor covered by a Bayer filter mosaic, which comprises 50% green, 25% blue, and 25% red squares. In contrast, the Foveon X3 Quattro direct image sensor uses no low-pass filter and is able to capture 100% of the data for blue, green, and red in each of its three layers. Due to this unique structure, the Foveon X3 Quattro direct image sensor can generate up to twice the resolution data of sensors using a Bayer filter. The SIGMA sd Quattro has an APS-C-size sensor with 19.6 megapixels in its top layer, giving it an equivalent total of approximately 39 megapixels and the outstanding image quality expected of a medium format camera. The SIGMA sd Quattro H features a newly developed APS-H size sensor (26.6 x 17.9mm) with 25.5 megapixels in its top layer for an equivalent total of approximately 51 megapixels. This larger sensor takes Foveon image quality to the next level, delivering more detailed images than ever before.