Ricoh Pentax 8.5mm f/1.9 SMC AL [IF] 01 Standard Prime Lens for Pentax Q System, Silver Review

The Ricoh Pentax 8.5mm f/1.9 SMC AL [IF] 01 is a standard prime lens designed exclusively for the Pentax Q mirrorless system. With a 35mm equivalent focal length of approximately 47mm (given the Q system's 5.5x crop factor), it delivers a natural field of view close to what the human eye sees, making it versatile for everyday shooting, street photography, and casual portraiture. The fast f/1.9 maximum aperture offers solid low-light performance and shallow depth-of-field potential, a welcome feature on the compact Q mount.

Build quality is typical of Pentax's SMC coated optics, with aspherical elements and internal focusing that keeps the lens compact and lightweight. At around $177 MSRP, it sits as an affordable entry point for Q system users looking for a step up from kit zooms. The 40.5mm filter thread is small but standard for this mount. Keep in mind that the Pentax Q system itself has been discontinued, so this lens is best suited to existing Q owners rather than new adopters building a system from scratch.