Pentax 135mm F/3.5 SMC M K-Mount Manual Focus Lens Review
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Our editorial take on the Pentax 135mm F/3.5 SMC M K-Mount Manual Focus Lens
The Pentax 135mm F/3.5 SMC M is a classic manual focus telephoto lens from Pentax's M series, designed for K-mount film and digital bodies. Originally introduced in the late 1970s, it offers a moderate telephoto focal length suited to portraiture, detail work, and selective framing. The SMC (Super Multi-Coated) designation indicates Pentax's multi-layer lens coatings, which help control flare and boost contrast even on older optical designs.
At $59 used, this lens represents an affordable entry point for shooters interested in manual focus telephoto work on Pentax DSLRs or mirrorless bodies with an adapter. The f/3.5 maximum aperture is modest by modern standards, but typical for compact telephoto primes of its era. Build quality is all-metal, and the 49mm filter thread keeps accessory costs low. Condition varies, with examples ranging from bargain-grade to excellent-plus copies available on the used market. This is a straightforward, no-frills lens for those comfortable with manual focusing and stop-down metering.
- All-metal construction with durable K-mount
- SMC multi-coating for improved contrast and flare resistance
- Compact and lightweight for a 135mm telephoto
- Affordable used pricing around $59
- Manual focus only with no electronic communication
- Modest f/3.5 maximum aperture limits low-light performance
Synthesized by Geared editors from early expert reviews.
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- KEHused● In stockBest price$59Buy
