Pentax 100mm f/2.8 SMC M Lens
The Pentax 100mm f/2.8 is a 100mm f/2.8 lens designed for Pentax K mount cameras. Used copies start from $90.78 on GearFocus, with buyer protection on every purchase.
Pentax 100mm f/2.8 SMC M Lens
Used Pentax 100mm f/2.8 Listings on GearFocus
Lens Overview — Pentax 100mm f/2.8
Key Features — Pentax 100mm f/2.8
100mm f/2.8 Prime: A fixed telephoto focal length with a wide f/2.8 maximum aperture, well-suited for portraiture and subject isolation.
SMC Multi-Coating: Pentax's Super-Multi-Coating reduces flare and ghosting for improved contrast and color fidelity in various lighting conditions.
Pentax K Mount: Compatible with a wide range of Pentax K mount SLR and DSLR bodies, as well as many mirrorless cameras via adapter.
Full-Frame Coverage: Designed to cover a full-frame image circle, ensuring no vignetting on compatible full-frame Pentax K mount bodies.
Manual Focus Only: Fully manual focus operation suits photographers who prefer precise, deliberate control, particularly in portrait and studio settings.
Lightweight 290g Build: At just 290g, this lens is easy to carry and handle during extended shooting sessions without adding significant weight.
Lens Specifications — Pentax 100mm f/2.8
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Macro, Creative Effects |
| Lens Type | Prime |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 100mm |
| Maximum Aperture | f/2.8 |
| Camera System | SLR |
| Lens Mount | Pentax K |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 49mm |
Description — Pentax 100mm f/2.8
The Pentax 100mm f/2.8 SMC M is a prime telephoto lens built around the Pentax K mount, designed to cover full-frame SLR systems. It offers a fixed 100mm focal length with a maximum aperture of f/2.8, giving photographers a capable light-gathering telephoto option in a compact, 290g package. Focusing is manual only, putting full control in the photographer's hands — a characteristic appreciated by those who prioritize precision over speed.
The lens accepts 49mm filters, a practical and commonly available thread size that works with a broad selection of screw-on filter options. With no image stabilization, users will want to maintain solid technique, particularly in lower light conditions. The lens is categorized as a full-frame design, ensuring full image circle coverage on compatible Pentax K mount bodies.
Altogether, its combination of a fast aperture, lightweight build, and standard filter thread makes it a practical manual-focus telephoto prime for Pentax K system photographers.
Pros — Pentax 100mm f/2.8
- ✓Wide f/2.8 maximum aperture offers strong light-gathering capability for a telephoto prime
- ✓Fixed 100mm focal length provides a dedicated telephoto perspective with no zoom compromises
- ✓Lightweight at just 290g, making it easy to handle during extended shooting sessions
Cons — Pentax 100mm f/2.8
- ✗Manual focus only — no autofocus support, which may limit usefulness in fast-moving situations
- ✗No image stabilization, requiring steady technique or faster shutter speeds in lower light
- ✗Pentax K mount limits compatibility to Pentax K system bodies without an adapter
Videos — Pentax 100mm f/2.8
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