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Master of reunion ceremonies

Here's a lens that will take you from the reunion group shot to a tight shot of the family water-skier's face — taken amidst the spray at the back of the boat. The zoom range is an impressive 7.5X, so you'll have options no matter the venue. With weather-resistant, dust-resistant construction, this lens is the perfect companion to the Pentax K-5 weather-resistant digital SLR. Between the two, you'll have a combo that's built for bringing home the elusive shot under challenging circumstances.

Plus, this lens isn't just rugged — it's got optical talents as well. Extra-low dispersion and aspherical glass elements, plus special Pentax coatings, make your images as sharp and artifact-free as they can be. And the DC (direct current) motor autofocus is quiet, responsive, and accurate.

Product Highlights:

  • Pentax KAF3 18-135mm f/3.5-5.6 ED/AL telephoto zoom lens with 35mm equivalent of 27.5-207mm
  • compatible with Pentax K-mount digital SLR and hybrid cameras, especially the weather-resistant Pentax K-5
  • ED (extra-low dispersion) and aspherical glass lens elements correct chromatic aberration for excellent image quality and sharpness
  • tightly sealed, weather-resistant and dust-resistant construction enhances durability for use in both rainy and dusty conditions
  • direct-current motor autofocus system is smooth, quiet and fast
  • constructed of 13 elements in 11 groups
  • minimum focus distance: 15-3/4"
  • minimum aperture: f/22 -f/38
  • filter size: 62mm
  • lens is 3" long, 2-5/16" in diameter
  • weight: 14.3 ounces
  • supplied accessories: front and rear lens caps, lens hood
  • warranty: 1 year
  • Our 60-day money-back guarantee

Pentax DA 18-135mm f/3.5-5.6 Lens Reviews

Average Customer Review:

3 Reviews

Great Lens--Why Discontinue???

Written by: D from Idaho on September 6, 2013

Crutchfield Customer Review (What's this?)

This lens is, as most reviewers note, the ideal zoom range, weight, and weather resistance. It is also very, very sharp--surprisingly so! Most of my photography is landscapes, and I find this to be the ideal lens for lightweight carrying, excellent sharpness, and color rendition. And it is a bargain too!

Pros: Weather sealing. Lightweight. Sharpness. Focus speed. Easy to carry.

Cons: None--except discontinued: WHY?!

Decent glass

Written by: JohnnyK from Irvine, CA on May 7, 2013

Crutchfield Customer Review (What's this?)

To be fair I am an amateur and this is my first zoom lens for my new K-5 iis. I used this lens - among other events - for a indoor recital and a camping tip. The indoor recital was a great test because of the low light condition but I think much of the credit goes to the camera. As for the camping trip it produced respectable pictures, if nothing spectacular - which I could blame myself instead :)

Pros: The best thing with this is it being weather resistant. I took the camera (also WR) on a camping trip and the weather went from warm to very cold (40 F) with rain and wind. Had it not a WR camera + lens I would be too worried to pull it out on the last day

Cons: It does its job but nothing 'jumps out' as amazing. However, for comparison, I have a 35mm prime lens and it produced some real amazing portraits.

Pentax k-30

Written by: chaslo from Arkansas on March 1, 2013

Crutchfield Customer Review (What's this?)

I was very happy and excited when I ordered my new camera. I am more excited and happy now that I have received the camera and using it. Thanks to the Norman and the Crutchfield Team.



Hands-on research

What's in the box?

Download owner's manual

  • Pentax-DA 18-135mm F3.5-5.6ED lens (with front and rear lens caps attached)
  • PH-RBC 62mm lens hood (installed)
  • Operating Manual
  • Notification of Change in Company Name sheet
  • Pentax Worldwide Service Network sheet
  • Serial Number Card

Features and Specs

Brand Compatibility Pentax
Image Stabilization No
Focal Length 18-135mm
Maximum Aperture F3.5 (W) - 5.6 (T)
Weight 14.3 ounces
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Overview: The smc Pentax-DA 18-135mm F3.5-5.6ED AL [IF] DC WR is a 7.5x telephoto zoom lens for Pentax D-SLR and interchangeable lens cameras. The extended 7.5x zoom range is ideal for a wide range of shooting conditions. It is weather-resistant for shooting in damp, inclement conditions.

Lens Mount: The lens has a KAF3-mount, and can fit Pentax D-SLR and interchangeable lens cameras with KAF, KAF2 and KAF3 mounts. This includes the Pentax K-5 and K-01 cameras.

Built-in Motor: The DA 18-135mm lens features a built-in direct current (DC) motor to give you quick, quiet autofocus operation.

Quick Shift Focus: The Quick Shift Focusing System allows for instant switching from Auto to Manual focus. If focus is set to Auto, you can focus manually after autofocus is achieved by manually turning the focusing ring. This can be done without changing the focus mode to Manual.

Lens Hood: The lens kit includes the PH-RBC 62mm lens hood to keep unwanted light out of the lens, and protect the front of the lens. It has a PL filter window which can be opened for facilitate the manipulation of the circular polarizing filter when the lens hood is attached. The hood can be reverse-mounted on the lens for storage. When installed, the hood adds approximately 1-1/2" to the overall length of the lens.

ED Glass: The Extra-low Dispersion (ED) glass lens element and a hybrid aspherical lens element offer superior sharpness with minimum chromatic and spherical aberration.

Super Protect: The Pentax-original SP (Super Protect) coating repels dust, water, and grease to help keep the lens clean.


  • Focal Length: 18-135mm
  • 35mm Equivalent: 27.5-207mm
  • Lens Construction: 13 elements in 11 groups
  • Mount Type: KAF3-mount
  • Maximum Aperture: F3.5-5.6
  • Minimum Aperture: F22-38
  • Maximum Magnification: 0.24x
  • Angle of View: 76°-11.9°
  • Minimum Focus Distance: 1.31' (15.72")
  • Lens Hood: PH-RBC 62mm (included)
  • Filter Diameter: 62mm
  • Dimensions:
    • Diameter: 2.865"
    • Length: 3.438" (3.883" w/caps)
    • Weight: 14.3 ounces (15.1 oz. w/lens hood)

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.