Ricoh 50mm f/1.7 Rikenon XR Manual Focus Lens for Pentax K-Mount Review

The Ricoh 50mm f/1.7 Rikenon XR is a legacy manual focus prime for Pentax K-mount cameras, typically found on the used market for around $50. Originally produced in the film era, this lens offers classic 50mm focal length and a fast f/1.7 maximum aperture, making it a budget-friendly option for portrait and low-light shooting on modern Pentax DSLRs or adapted mirrorless bodies.

As a vintage manual lens, the Rikenon XR requires full manual focus and aperture control. Build quality is generally solid metal and glass construction typical of 1980s Japanese optics. Image quality at this price point tends to be decent wide open with improved sharpness when stopped down a stop or two. The 52mm filter thread is a common size. This lens fits shooters looking to experiment with manual focus or add an affordable nifty fifty to their kit without the cost of modern autofocus glass.