The GR lens has been imbued with our unique optical technology that aims to always provide high image quality. The GR IIIx uses a newly developed optical system consisting of 7 elements 5 groups with a new focal length of 26.1 mm (approx. 40 mm in 35 mm equivalent focal length). High-refractive index low-dispersion glass lenses and aspherical high-precision molded glass lenses are optimally placed to suppress optical distortion and chromatic aberration to the absolute limit, delivering a high level of sharpness. GR III/GR IIIx is equipped with a high-resolution, wide dynamic range APS-C format CMOS image sensor (approx. 24.24 effective megapixels). It can handle a large size print and an anti-aliasing (AA) filterless construction that utilizes the characteristics of the high-resolution lens for high-definition detail reproduction. Both the image sensor and lens are also optimized for the best possible image quality.