Ricoh is adding to its Pentax medium-format line of optics with a wide-angle 35mm f/3.5 lens. The HD PENTAX-D FA645 35mm f/3.5AL[IF] lens  features newly designed high-grade elements treated with PENTAX-original HD coating, which, the company says, will deliver “high-contrast, high-resolution images even in the most challenging lighting conditions.” …