Pentax's classic fast fifty — the K-mount f/1.7 nifty fifty that defined a generation of Pentax shooters.
The Pentax SMC 50mm f/1.7 is a fast standard prime from Pentax — more compact than the f/1.4 while still fast. Pentax K mount.
50mm focal length. f/1.7 maximum aperture. SMC coating. Manual focus. 49mm filter thread. Pentax K mount.
The SMC 50mm f/1.7 is a middle ground between the brighter f/1.4 and the compact f/2 — f/1.7 provides useful low-light performance in a smaller package than the f/1.4. Popular for adapted use. Compare with the f/1.4 (id 3324) and f/1.4 A-series (id 3454).
On the used market the Pentax SMC 50mm f/1.7 is a compact fast prime. Condition checks: aperture blades, SMC coating. Pentax K mount.