
Pentax
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The Pentax SMC DA 18-135mm f/3.5-5.6 ED AL (IF) DC WR is a compact, weather‑resistant 7.5× zoom lens for APS‑C K‑mount DSLRs, offering a versatile focal range from wide‑angle to telephoto. It combines quiet SDM autofocus, Quick‑Shift manual focus, and high‑quality coatings for everyday shooting.
Pros
Current
$476.95
Average
$387.33
Lowest
$139.99
Highest
$476.95
Lower = better sales rank
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From Expert Reviews
Praised by Experts
Criticized by Experts
From User Reviews
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Users Complain About
Expert Opinion
Professional reviewers consider the Pentax 18‑135mm a solid, versatile workhorse that balances size, price, and image quality. They commend its quiet SDM autofocus and broad focal range, but note the variable aperture as a compromise that makes it less suitable for low‑light or high‑creative‑control applications where constant fast apertures are preferred.
What Users Say
Everyday users praise the lens for its reliable autofocus, compact form factor, and weather‑resistant build, finding it ideal for travel and general photography. The most common criticism from consumers mirrors the experts: the variable aperture reduces low‑light performance and limits bokeh at the telephoto end.
Common Complaints
Variable aperture that narrows to f/5.6 at the telephoto end, limiting low‑light capability and bokeh; perceived lower optical performance compared to constant‑aperture DA‑Star lenses.
How It Compares
vs. 16-50mm f/2.8 DA-Star + 50-135mm f/2.8 DA-Star Combination
Advantages
Disadvantages
Choose the DA‑Star combo if you need consistent fast apertures and top‑tier image quality; stick with the 18‑135mm for lighter, all‑in‑one convenience.
vs. 17-70mm f/4 Alternative
Advantages
Disadvantages
The 17‑70mm f/4 is suitable for photographers who prioritize a constant aperture over maximum telephoto reach; the 18‑135mm remains the better choice for those needing broader zoom versatility.