Sigma Photo 18-250mm f/3.5-6.3 Lens

Wide-angle to telephoto macro zoom lens for APS-C cameras (Pentax/Samsung mount)

Item #: 366883PA

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Compact, versatile, and capable

The above description pretty much covers what you can expect from this well-appointed, 18-250mm wide-angle to telephoto zoom lens from Sigma Photo. If you own any of today's popular APS-C cameras, this rugged, lighweight lens is the perfect one to have mounted when you have no idea what your next photo opportunity will be. A wide cityscape from across the river? You're covered. A close-up of the kite your son is flying over by the marina entrance? Yes again. Everything in between? But of course.

And we do mean everything, because this lens is also a good macro zoom, so close-ups of the world of nature are a breeze as well. A close working distance of 13.8 inches and a magnification ratio of 1:2.9 means you'll be able to fill the frame with subjects like flowers, stamps and coins, or insects, among others.

The lens boasts solid optical build quality, of course, and uses Thermally Stable Composite (TSC) material in order to give the lens enhanced stability in temperature extremes. Three aspherical elements and one special low dispersion glass element keep color fringing anomalies to a minimum through the entire zoom range.

Product Highlights:

  • 18-250mm f/3.5-6.3 DC HSM telephoto zoom lens
  • compatible with Pentax and Samsung digital APS-C sensor cameras
  • not recommended for full-frame cameras
  • effective focal length:
    • 27-375mm with Pentax and Samsung APS-C sensor cameras
  • optical stabilization not available for this mount
  • 3 aspherical elements and 1 special low dispersion glass element for impressive contrast and clarity
  • super multi-layer lens coating minimizes flaring and ghosting
  • minimum aperture: f/22
  • minimum focus distance: 17.7"
  • constructed of 16 elements in 13 groups
  • filter size: 62mm
  • lens is 3-11/16" long, 2-15/16" in diameter
  • weight: 16.6 ounces
  • warranty: 4 years
  • Our 60-day money-back guarantee
Supplied Accessories:
  • lens hood, front and rear lens cap

See Compact System Cameras that work with this item

Hands-on research

What's in the box?

Download owner's manual

  • Sigma 18-250mm F3.5-6.3 DC Macro OS HSM zoom lens for Pentax
  • LCF-62 III Front lens cap
  • Rear lens cap for Pentax
  • Lens hood
  • Instructions
  • Warranty Sticker
  • Sigma's Americas Limited Warranty

Features and Specs

Brand Compatibility Pentax
Image Stabilization No
Focal Length 18-250mm
Maximum Aperture f/3.5 (W) - 6.3 (T)
Weight 16.6 ounces
Parts Warranty 4 Years
Labor Warranty 4 Years

Product Research


Overview: The Sigma AF 18-250mm F3.5-6.3 DC Macro HSM (Model #883) is a multi-purpose 13x zoom lens that covers wide angle to telephoto to macro photography. The lens is designed to be used with cameras with APS-C size sensors. It is a great lens for travel, landscapes, family, and nature and wildlife, as well as macro photography. The lens has the Pentax mount, and comes with a padded carrying case, lens hood, and front & rear caps.

Lens Hood: The 18-250mm lens includes a lens hood to help prevent stray light from entering the lens, causing flare, and to protect the lens from rain, snow, and dust. When not in use, the lens hood can be inverted and mounted onto the lens backwards for storage.

Focus Mode Switch: The lens features a two-way switch for setting the focus mode: AF (auto focus) or MF (manual focus).

Sigma Technology: The lens has the following Sigma technology built-in:

  • Thermally Stable Composite (TSC): The lens utilizes a thermally stable composite material in the lens barrel, which has a high degree of elasticity, and exhibits little variation in its structure in extreme temperature conditions.
  • Hyper Sonic Motor (HSM): The Hyper Sonic Motor uses ultrasonic waves to drive the autofocus mechanism. This extremely quiet operation helps avoid disturbing photographic subjects, and isn't picked up by the microphone while recording video.
  • Super Multi-layer Coating: Sigma's own Super Multi-layer Coating suppresses lens flare and ghosting by preventing reflections within the lens.
  • Rounded Diaphragm: Using a rounded diaphragm instead of a polygonal shaped one produces pleasingly rounded out-of-focus light points when opened to near maximum aperture.


  • Lens Construction: 16 Elements in 13 Groups
  • Angle of View: 76.5° to 6.5°
  • Number of Diaphragm Blades: 7
  • Maximum Aperture: f/3.5 (18mm), f/6.3 (250mm)
  • Minimum Aperture: f/22
  • Minimum Focusing Distance: 13.8"
  • Filter Size: 62mm
  • Maximum Magnifications: 1:2.9
  • Dimensions: Diameter=2.919", Length=3.656"
  • Weight: 16.6 ounces

Our Product Research Team

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Sigma Photo 18-250mm f/3.5-6.3 Lens Reviews

Average Customer Review:

8 reviews
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Written By Cristino, Puerto Rico on Saturday, March 28, 2015

This Sigma lens has replaced the two 'kit' lenses that came with my D5200 camera: a 18-55mm and a 55-200mm. It takes some time to get used to the zoom because it goes counter-clockwise, unlike the kit lenses which go clockwise. Zoom is very smooth, very fast. Autofocus is very fast too with little, if any 'hunting'. Lens creep is avoided by using a lock button, which will keep the lens at the 18mm position. It is 62mm wide which means new filters to buy.

Unless you zoom your pictures to pixel-level, you'll find this lens is sharp.

All in all, I'm very, very happy with this lens.

Pros: Only one lens to carry! Picture quality is very good. Lots of bang for your buck!

Cons: Nothing bad to say!

I just put my two nikon lenses up for sale

Written By Dominick B, New Jersey on Wednesday, December 03, 2014

Crutchfield Customer Review (What's this?)

This Sigma lens performs beautifully! Smooth action, quality built, no problem. I am an avid amateur photographer who takes thousands of pictures year-- of family, landscapes, and especially grandchildren. I simply can't say anything negative about this lens. My kit lens, a nikkor 18-55 and my nikkor 55-200 went on sale today.

Pros: One lens, not two

Cons: nothing , except for lens creep, a problem all lenses like this have. A lens lock solves the creep.

lens for cannon rebel 5

Written By lens 18-250, Malott, WA on Sunday, July 06, 2014

Crutchfield Customer Review (What's this?)

So nice to have this range in one lens instead of two, a 18-55 and a 75-300 that came with the camera. You don't have to constantly change lens. You already have it. Thanks.

Pros: One lens instead of two that does the same thing. Smaller and easier to handle then the 75-300 lens and does practically the same thing.

Cons: Can't think of any except maybe you don't have the extra 50 feet that the 75-300 lens has, but for me that is not a problem.

Very good lens

Written By Miro, Richland, WA on Tuesday, June 03, 2014

Crutchfield Customer Review (What's this?)

Very good lens. I have tested it for last two weeks. Everything works well. I am satisfied with the purchase

Sigma lens 18-250

Written By phillip, CA on Thursday, January 16, 2014

Crutchfield Customer Review (What's this?)

Lens creep is a big issue with this lens. Please fix it Sigma!

Pros: nothing to brag about .. maybe the low price

Cons: lens creep ... big time. Didn't expect this for a made in Japan product. The auto focus without manual overwrite is annoying.

Great range at a good price

Written By FrankB, Charlottesville, VA on Monday, November 11, 2013

Crutchfield Customer Review (What's this?)

So far no sign of lens creep, common to many extended range zooms. Seems sharp throughout range, and the macro setting is an added plus.

Pros: Price, range

Cons: Might seem heavy to some, but not this old guy.

Sigma 18-250 Zoom

Written By Evan, Co on Tuesday, August 13, 2013

Crutchfield Customer Review (What's this?)

This is an almost perfect walk around lens. With this lens you can cover almost every need.

Pros: Zoom Range, Picture quality, light and sturdy.

Cons: Non yet

Sigma Photo 18-250mm f/3.5-6.3 Lens

Written By Shorty, Charlottesville on Monday, July 22, 2013

Crutchfield Customer Review (What's this?)

Haven't had a chance to use it much but It works on my Nikon D40 just like the original! It's easy to focus, set the range, and is very sharp. A good lens. It is heavier than the original and you will need a confortable strap if you plan to carry it for a long period.

Get everything you’ll need to enjoy your new Sigma Photo 18-250mm f/3.5-6.3 Lens

Protect your lens from minor bumps and scratches. Lens filters can reduce reflections or glare, or increase contrast on your shots.
Keep your new lens safe from bumps and scratches.
Get your lenses clean and fingerprint-free with a cleaning kit.
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