Sigma 17‑70mm f2.8‑4 DC Macro HSM Lens Pentax K AF – Versatile Zoom

Overview

The Sigma 17–70mm f/2.8–4 DC Macro HSM is a highly versatile autofocus zoom designed for Pentax K‑mount digital cameras. Covering an extremely useful range from wide‑angle to short telephoto, it serves as an excellent all‑purpose lens for travel, landscapes, portraits and close‑up work. The bright f/2.8–4 aperture range offers better low‑light performance than most kit lenses, while Sigma’s HSM motor provides fast, quiet autofocus on compatible Pentax bodies. The lens also features a close‑focus “macro” capability, allowing detailed shots at short working distances.

This model is well regarded for its balance of image quality, portability and flexibility, making it a strong upgrade from standard kit zooms.

Condition

Overall Condition: Very Good

• Light cosmetic wear consistent with normal use.
• Autofocus operates correctly on Pentax K‑mount AF bodies.
• Zoom and focus rings move smoothly with no stiffness.
• Aperture blades are clean and responsive.
• Optics present well with typical minor dust only.
• A clean, reliable example of this popular Sigma all‑rounder.

Included

• Sigma 17–70mm f/2.8–4 DC Macro HSM Lens (Pentax K)
• Front Cap
• Rear Cap
• Hood

Collector & User Notes

This lens is part of Sigma’s DC series, designed specifically for APS‑C digital cameras. It is widely appreciated for its optical sharpness, improved contrast over earlier Sigma zooms and its genuinely useful close‑focus capability, which approaches 1:2.3 magnification. The HSM motor is a welcome feature for Pentax users, offering quieter and more responsive autofocus than screw‑drive lenses.

Its combination of wide‑angle coverage, portrait‑friendly mid‑range and near‑macro performance makes it a strong single‑lens solution for everyday shooting.

Key Features

• 17–70mm wide‑to‑telephoto zoom range
• Bright f/2.8–4 aperture
• Pentax K autofocus mount
• HSM focusing motor for fast, quiet AF
• Close‑focus “macro” capability
• DC design optimised for APS‑C digital sensors
• Smooth zoom and focus action
• Suitable for travel, portraits, landscapes and close‑ups

SEO‑Optimised Keywords

Sigma 17‑70mm Pentax
Sigma DC Macro HSM lens
Pentax K autofocus zoom
Sigma 17‑70 f2.8‑4
Pentax APS‑C zoom lens
Sigma macro zoom Pentax
All‑purpose Pentax lens
Travel zoom Pentax K
Versatile Sigma zoom lens
17‑70mm Pentax mount