Sigma 18-35mm f1.8 DC Pentax K Mount 52471570 - 1804118

Sigma 18-35mm f1.8 DC Pentax K Mount 52471570 - 1804118

This Sigma 18-35mm f1.8 DC Pentax K Mount is in great cosmetic condition with minor handling wear found throughout, please see photos for visual reference. Cosmetically, this lens has been rated at a (9) condition. This lens is in proper working order; the zoom and the focus ring turn smoothly, the autofocus is accurate, and the glass is clean and clear with no signs of fungus, haze, or marks present. This lens includes the hood and rear cap.

What our Experts Think

• Game‑changing zoom with f/1.8 throughout
  One of the only zoom lenses with a constant f/1.8 aperture, delivering exceptional low‑light performance and shallow depth of field
• Outstanding optical quality
  DC optical design produces sharp, high‑contrast results across the zoom range with controlled aberrations
• Perfect for APS‑C Pentax shooters
  Optimized for crop sensor bodies, giving a versatile 27–52.5mm equivalent on Pentax K mount
• Fast, smooth autofocus
  Reliable AF performance ideal for both still photography and video

Q&A

Q1: What type of lens is the Sigma 18-35mm f/1.8 DC?
A: A fast, wide-to-standard zoom lens designed for APS-C Pentax DSLR cameras, ideal for general photography and creative projects.

Q2: What is this lens best used for?
A: Perfect for portraits, landscapes, street photography, and low-light shooting thanks to its bright f/1.8 aperture.

Q3: What is the focal length range?
A: 18–35mm provides a versatile wide-to-standard zoom, equivalent to ~27–52.5mm on full-frame cameras.

Q4: Does it have autofocus?
A: Yes, it features a Hyper Sonic Motor (HSM) for fast and quiet autofocus with full-time manual focus override.

Q5: Is it compatible with full-frame cameras?
A: No, it is designed exclusively for APS-C Pentax K-mount cameras.

Q6: What is the aperture range?
A: Constant f/1.8 aperture throughout the zoom range, allowing excellent low-light performance and shallow depth of field.

Q7: What is the minimum focusing distance?
A: 28 cm, allowing for close-up shots with strong subject separation

Maintenance Tips

• Use lens hood & caps: Protect the large front element and minimize flare; always store with caps on.
• Clean optics carefully: Start with a blower, then use a microfiber cloth; avoid harsh chemicals to preserve the multi-coated glass.
• Protect from dust & moisture: Not fully weather-sealed—store in a dry case with silica gel to prevent fungus.
• Handle zoom and focus rings gently: Smooth internal zoom and HSM focus require careful handling to maintain alignment and autofocus accuracy.
• Check electronic contacts: Clean periodically for reliable communication with the Pentax K mount camera.
• Avoid extreme conditions: Excessive heat, humidity, or sudden temperature changes can degrade internal elements and coatings.
• Regular inspection: Look for dust, haze, or fungus, especially in the 17-element optical design.
• Store upright in a padded case: Keeps internal components stable and prolongs lens life.