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Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount) USA

You Pay: $849.00
Product Highlights
  • Full Frame & APS-C Compatibility
  • Hyper-Sonic Focus Motor
  • In-Lens Optical Stabilization
  • Includes Lens Hood
  • Removable Tripod Collar

The 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens from Sigma is a telephoto zoom lens for use with Pentax DSLR cameras. The lens features built-in Optical Stabilization (OS) for sharper photos, and a Hyper-Sonic Focus Motor (HSM) for quick and quiet autofocus.

Its optical formula is highlighted by three Special Low Dispersion (SLD) glass elements, which serve to correct color and preserve sharpness throughout the entire 3.3x zoom range of the lens. Its rear focusing system corrects for aberration fluctuations caused by focusing.

The lens, which is only eight inches in length and weights a mere 3.9 pounds, ships with a lens hood, a removable tripod collar, front and rear caps, and a carrying case. While it is not a true macro lens, its innate close focusing capability makes it a great use for capturing smaller objects including flowers -- without having to change to a dedicated macro lens.

Because most Pentax cameras feature in-body image stabilization, the lens provides you with the option of disabling the in-lens stabilization during use -- giving you the flexibility to use the image stabilization of your choice: in-body or in-lens. Owners of legacy bodies that do not have stabilization will find this option especially useful. Of course, you can disable the stabilization feature in both the lens and the body for those times when it is appropriate to do so, such as when you are using a tripod.

Designed for use with full frame digital SLR cameras. May also be used with smaller APS-C size sensors with a corresponding effective increase in equivalent field of view to about 180-600mm with most cameras
Offers Sigma's OS System (Optical Stabilization) allowing handheld photography even in low-light situations
HSM (Hyper-Sonic Motor) ensures a quiet and high-speed auto focus
Minimum focusing distance of 59" with a maximum magnification of 1:4.2
Compact lens weighs only 3.9 pounds and is a mere 8" in length
A lens hood, tripod socket (TS-31), front & rear lens caps, and carrying case are included with the lens
Performance
Focal Length 120 - 400mm
Aperture Maximum: f/4.5 - 5.6
Minimum: f/22
Camera Mount Type Pentax K
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Pentax Digital (APS-C)
Angle of View 20.4° - 6.2°
Minimum Focus Distance 4.92' (1.50 m)
Magnification 0.23x
Maximum Reproduction Ratio 1:4
Elements/Groups 21/15
Diaphragm Blades 9
Features
Image Stabilization Yes
Autofocus Yes
Tripod Collar Yes
Environmental
Physical
Filter Thread 77 mm
Dimensions (DxL) Approx. 3.6 x 8.0" (9.14 x 20.32 cm)
Weight 3.86 lb (1.75 kg)
Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount)
  • Lens Hood
  • TS-31 Tripod Socket/Collar
  • Front Cap
  • Rear Cap
  • Carrying Case
  • Limited 1-Year North and South America Warranty Against Manufacturing and Workmanship Defects.
  • Limited 3-Year U.S.A. Extended Warranty Extension Against Manufacturing and Workmanship Defects.
  • REVIEW SNAPSHOT®

    by PowerReviews
    Sigma120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount)
     
    4.8

    (based on 6 reviews)

    Ratings Distribution

    • 5 Stars

       

      (5)

    • 4 Stars

       

      (1)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Consistent output (5)
    • Strong construction (5)
    • Fast / accurate auto-focus (4)
    • Rugged (3)

    Cons

    • Heavy (5)

    Best Uses

    • Wildlife photos (6)
      • Reviewer Profile:
      • Photo enthusiast (4)
      • Was this a gift?:
      • No (5)

    Reviewed by 6 customers

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    Displaying reviews 1-6

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    (2 of 2 customers found this review helpful)

     
    5.0

    Excellent Lens for the Price

    By RuralDigital

    from South Central Nebraska

    About Me Photo Enthusiast

    Pros

    • Consistent Output
    • Durable
    • Fast / accurate auto-focus
    • Rugged
    • Strong Construction

    Cons

    • Heavy

    Best Uses

    • Hard To Approach Subjects
    • Landscape/Scenery
    • Wildlife Photos

    Comments about Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount):

    I am very happy with this lens. I have seen little in the way of chromatic, pincushion, or barrel distortion. With the FF design of this lense, the 1.5 crop factor on my K5 eliminates vignetting as a practical consideration. In TaV Mode (Shutter and Appeture Priority) I can shoot quite well handheld in the daytime, with sun or clouds, dispite the considerable weight of this lens. I have set the shutter speed as high as 1/400 and not overtaxed the K5's auto ISO range.I don't hike long distances with it, so the weight has not been much of an issue for me. I get sharp images, good colors, and I can shoot many interesting subjects without having to enter private property. If money is an object, and you don't mind the weight, it's a great lens.

    • Was this a gift?:
    • No

    Share this review

    (2 of 2 customers found this review helpful)

     
    5.0

    Love this lens

    By D Chakravarti

    from Omaha, NE

    About Me Photo Enthusiast

    Verified Buyer

    Pros

    • Consistent Output
    • Fast / accurate auto-focus
    • Nice Bokeh
    • Not too heavy
    • Strong Construction

    Cons

      Best Uses

      • Sports/Action
      • Wildlife Photos

      Comments about Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount):

      Sigma previously had a similar lens, not OS, no HSM, and it was a versatile, good, sharp lens. This one is definitely much better. Imagine taking sharp bird pictures hand-held! You can do it with this lens, with pretty good success rate. You can also carry this lens in your existing bag. I use a Thinktank urban disguise 50, and this lens does fit inside nicely and it does not cramp out space for other stuff. I can still carry my usual assortment of lenses and a flash. Portability is a big issue for me. And this lens takes 77mm filters, which is also a plus. I was thinking about getting the newer Bigma, for the greater reach. I did not because it is a bigger, heavier lens, and needed bigger filters. As photographers like to say, walking a few steps can make up for focal length. Well, one can, at least some of the time, when it is not too dangerous :-) This is a keeper lens for me.

      Share this review

      (1 of 1 customers found this review helpful)

       
      5.0

      awesome lens

      By FLkrakr

      from Lecanto, FL

      About Me Photo Enthusiast

      Verified Buyer

      Pros

      • Consistent Output
      • Durable
      • Strong Construction

      Cons

      • Heavy

      Best Uses

      • Wildlife Photos

      Comments about Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount):

      I use this lens for wildlife photography and am impressed with the quality of photos. SO much more sharper and clearer.
      Only drawback is the weight. Kinda heavy to haul around all day.

      • Was this a gift?:
      • Yes

      Share this review

      (2 of 2 customers found this review helpful)

       
      5.0

      Sharp, Clear, Got My Money's Worth

      By KYRoadkill

      from Kentucky

      About Me Pro Photographer

      Verified Buyer

      Pros

      • Consistent Output
      • Fast / accurate auto-focus
      • Rugged
      • Strong Construction

      Cons

      • Heavy

      Best Uses

      • Landscape/Scenery
      • Wildlife Photos

      Comments about Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount):

      Nature photographer using for wildlife, other nature photos that I cannot get close enough to get a good shot. Images so far have been sharp, clear and right on the money.

      • Was this a gift?:
      • No

      Share this review

      (2 of 2 customers found this review helpful)

       
      4.0

      Good results with certain limitations.

      By Buckeyemikie

      from Cincinnati, OH

      About Me Photo Enthusiast

      Verified Buyer

      Pros

      • Rugged

      Cons

      • Heavy
      • Poor in Low Light

      Best Uses

      • Wildlife Photos

      Comments about Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount):

      Not as sharp wide open and at 400MM. At F8 & above, excellent results; very good to good results as you approach 400MM at wider aperatures. Requires religious attention to technique to ensure sharp photos.

      • Was this a gift?:
      • No

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      (4 of 4 customers found this review helpful)

       
      5.0

      Better than I thought it would be

      By Bucktown Mike

      from Chicago area

      About Me Semi-pro Photographer

      Verified Buyer

      Pros

      • Consistent Output
      • Fast / accurate auto-focus
      • Strong Construction

      Cons

      • Heavy

      Best Uses

      • Sports/Action
      • Wildlife Photos

      Comments about Sigma 120-400mm f/4.5-5.6 DG APO OS HSM Autofocus Zoom Lens (Pentax Mount):

      Since I own several other Sigma lenses, I knew the quality would be first-rate. What surprised me was the terrific image quality at 400mm. Also, with the OS I can actually hand-hold this lens for most of my daytime shooting.

      • Was this a gift?:
      • No

      Share this review

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