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Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K

B&H # SI5014PE MFR # 310-109 USA
No Longer Available

Product Highlights

  • Full Frame Format
  • Aperture Range: f/1.4 to 16
  • One Aspherical Lens
  • HyperSonic Motor AF System
  • Minimum Focus Distance: 17.7"
  • Rounded 9-Blade Diaphragm
  • Filter Thread: 77mm
  • Lens Hood and Case Included
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Providing a large aperture useful for low-light shooting and separating your subject from the background, the 50mm f/1.4 EX DG HSM Lens from Sigma is stand prime lens well-suited to full-frame and APS-C Pentax K mount digital cameras. The aperture ranges from f/1.4 to f/16 for control over light and depth-of-field. Also, the 50mm has an aspherical lens to control distortion and aberrations.

Featuring a HyperSonic Motor AF system, the lens has fast autofocus and can get a close as 17.7". A rounded 9-blade diaphragm also assists in ensuring that your have smooth out-of-focus elements. A front thread will accept 77mm filters and the lens comes with caps, a lens hood, and a carrying case.

Performance
Focal Length 50mm
Comparable 35mm Equivalent on APS-C Format Focal Length: 75 mm
Aperture Maximum: f/1.4
Minimum: f/16
Camera Mount Type Pentax K
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Pentax Digital (APS-C)
Angle of View 46.8°
Minimum Focus Distance 1.48' (45 cm)
Maximum Reproduction Ratio 1:7.4
Elements/Groups 8/6
Diaphragm Blades 9, Rounded
Features
Image Stabilization No
Autofocus Yes
Tripod Collar No
Physical
Filter Thread 77 mm
Dimensions (DxL) Approx. 3.3 x 2.7" (8.38 x 6.86 cm)
Weight 1.11 lb (505 g)
Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K
  • Lens Hood
  • Carrying Case
  • Front Lens Cap
  • Rear Lens Cap
  • 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
    Sigma50mm f/1.4 EX DG HSM Lens for Pentax K
     
    4.6

    (based on 24 reviews)

    Ratings Distribution

    • 5 Stars

       

      (16)

    • 4 Stars

       

      (7)

    • 3 Stars

       

      (1)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Fast / accurate auto-focus (20)
    • Strong construction (17)
    • Nice bokeh (16)
    • Durable (14)
    • Consistent output (12)

    Cons

    • Heavy (8)

    Best Uses

    • Low light (17)
    • Weddings (13)
    • Night photography (11)
    • Landscape/scenery (10)
    • Portraits (4)
      • Reviewer Profile:
      • Photo enthusiast (10), Semi-pro photographer (5), Photography student (3)
      • Was this a gift?:
      • No (16)

    Most Liked Positive Review

     

    Bokeh Master

    This lens is the master of Bokeh.

    Beautiful tack sharp images with a bokeh background can be achieved with a bit of manual focusing.

    In low light (shade...Read complete review

    This lens is the master of Bokeh.

    Beautiful tack sharp images with a bokeh background can be achieved with a bit of manual focusing.

    In low light (shade and indoors) the lens produces amazing pictures without the use of a flash.

    One of the fastest lenses I have ever used, action shoots can be frozen in time with ease.

    This lens lives on my Pentax K20D and never fails to impress me.

    The only reason I gave it 4 stars instead of 5 was that it does need a small bit of assistance with focusing from time to time and it is heavy... but worth it!

    VS

    Most Liked Negative Review

     

    Marvellous Lens with horrible focus

    The lens has a wonderful bokeh and the colours are beautiful - but it has a bitter downside: The lens focused approximately 1/2 inch in front of the object (nearly too much for...Read complete review

    The lens has a wonderful bokeh and the colours are beautiful - but it has a bitter downside: The lens focused approximately 1/2 inch in front of the object (nearly too much for the camera - K20D - to compensate). Now it's on the way to SIGMA - and I expect them to fix it.
    Some positive sides: The HSM is very fast, and you need nearly no light to make brilliant pictures. Also due to its full-frame compatibility there is barely any vignetting on APS/C cameras.
    I would nevertheless recommend the lens - but be aware you might have the same problem to get solved...

    Reviewed by 24 customers

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    Displaying reviews 1-20

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    5.0

    I would buy this product again and again

    By Pixel Photo

    from Quebec, Canada

    About Me Semi-pro Photographer

    Verified Buyer

    Pros

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

    Cons

      Best Uses

      • Indoors/Low Light
      • Night Photography
      • Weddings/Events

      Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

      Superbe lens quality , solid et fast :)

      • Was this a gift?:
      • No

      Share this review

       
      5.0

      Great lens great price

      By Rich

      from Chicago Illinois

      About Me Photo Enthusiast

      Verified Buyer

      Pros

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

      Cons

        Best Uses

        • Indoors/Low Light
        • Night Photography
        • Weddings/Events

        Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

        I have 2 copies of this lens for my pentax and I have had copies in the past for an Olympus it has all been a joy to use. The current price is also hard to beat.

        • Was this a gift?:
        • No

        Share this review

         
        5.0

        Great prime!

        By R2

        from San Juan Islands

        Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

        Excellent lens. Stopped at 1.4 you have to be careful with focus because the narrow depth of field is impressive! Great fast and almost silent lens. Will buy sigma again!

        Share this review

         
        4.0

        I will buy every time lenses from Sigma!

        By BRV Pentax shooter

        from philippines

        About Me Photo Enthusiast

        Verified Buyer

        Pros

        • Consistent Output
        • Durable
        • Easily Interchangeable
        • Fast / accurate auto-focus
        • Nice Bokeh
        • Rugged
        • Strong Construction

        Cons

          Best Uses

          • Indoors/Low Light

          Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

          great and excellent product from Sigma!

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          So far so very good ...

          By Hawki

          from Extreme Northern California

          About Me Photo Enthusiast

          Verified Reviewer

          Pros

          • Fast / accurate auto-focus
          • Nice Bokeh
          • Rugged
          • Strong Construction

          Cons

            Best Uses

            • Indoors/Low Light
            • Weddings/Events

            Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

            After reading all of professional and user reviews about potential focus issues, I hesitated over this purchase. Knowing that buying from B&H also meant proper support, I decided to pull the trigger ... Boy, am I glad I did.
            I spent the first hour testing the lens against my F50 f1.7, checked front/back focusing (now set to -2) and checked sharpness at all apertures.
            The lens passed all tests with flying colors, it met or exceed my expectations. I also love the hyper-sonic focusing ... I find it very quiet, fast and so far, very accurate.
            On my K20d with grip, it feels perfect ... one of the few lenses I've used that the balance just feels right.
            I also like the new finish much more than the old EX finish from Sigma.
            This lens is a definite keeper that is sure to become the lens I leave on the body.

            • Was this a gift?:
            • No

            Share this review

             
            5.0

            Replaced 50mm

            By HarrisonW

            from London, ON

            About Me Photography Student

            Verified Buyer

            Pros

            • Consistent Output
            • Durable
            • Easily Interchangeable
            • Fast / accurate auto-focus
            • Lightweight
            • Nice Bokeh
            • Rugged
            • Strong Construction

            Cons

              Best Uses

              • Indoors/Low Light
              • Landscape/Scenery
              • Sports/Action
              • Weddings/Events

              Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

              New replaced lens from B&H is 100% in focus. It is so sharp I am shocked. Takes great photos! Thanks alot!

              • Was this a gift?:
              • No

              Share this review

               
              4.0

              Product being replaced

              By HarrisonW

              from London, ON

              About Me Photography Student

              Verified Reviewer

              Pros

              • Durable
              • Easily Interchangeable
              • Fast / accurate auto-focus
              • Nice Bokeh
              • Rugged
              • Strong Construction

              Cons

              • Blurry Focus

              Best Uses

              • Indoors/Low Light
              • Landscape/Scenery
              • Sports/Action
              • Weddings/Events
              • Wildlife Photos

              Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

              I used this lens for portrait shots. I have taken a few that are perfectly in focus however close objects at 1.8-1.4 are not in focus(front focus). So i have chosen to replace it with a new one. B&H has great customer service, no questions asked! The lens feels great on my K3. Well balanced and is a great size. The throw on manual focus is rather short so shooting in AF mode is almost essencial. I would recommend this to anyone shooting pentax, its a far better build than my pentax lenses.

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              Fast & Sharp

              By Frattofoto

              from New Jersey

              About Me Photo Enthusiast

              Verified Buyer

              Pros

              • Easily Interchangeable
              • Fast / accurate auto-focus
              • Nice Bokeh
              • Strong Construction

              Cons

              • Heavy

              Best Uses

              • Indoors/Low Light
              • Landscape/Scenery
              • Night Photography
              • Weddings/Events

              Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

              I sold my Pentax 50 to get this lens. I find the Sigma much sharper wide open than the Pentax. Lens is heavy for a 50 but I personally I like heavier lenses. Wonderful bokeh. I find the focus to be very fast and quiet. I also like the longer warranty.

              Share this review

               
              4.0

              value for the cost

              By banjo man

              from saranac lake, ny

              About Me Photography Student

              Verified Buyer

              Pros

              • Durable
              • Easily Interchangeable
              • Fast / accurate auto-focus
              • Lightweight
              • Rugged
              • Strong Construction

              Cons

                Best Uses

                • Landscape/Scenery
                • Wildlife Photos

                Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                ease of use, cost of product, fully automatic and nice features

                • Was this a gift?:
                • Yes

                Share this review

                 
                5.0

                This is a great lens for the price,

                By DUBCITYMAN

                from LANCASTER CA.

                About Me Pro Photographer

                Verified Buyer

                Pros

                • Durable
                • Fast / accurate auto-focus
                • Nice Bokeh

                Cons

                • Heavy

                Best Uses

                • Indoors/Low Light
                • Landscape/Scenery
                • Night Photography
                • Weddings/Events

                Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                Iknow it is heavy for the size but you have to consider the motor that maks it work for auto focusing.Classie lens.Sigma is a great lens,that's all I have.It is easy to use & sharp focus.It great for shallow dof that's what I bought it for.

                • Was this a gift?:
                • No

                Share this review

                (2 of 2 customers found this review helpful)

                 
                5.0

                Must have lens as a wedding photographer

                By Agent 007

                from Summerville, SC

                About Me Semi-pro Photographer

                Verified Reviewer

                Pros

                • Consistent Output
                • Durable
                • Easily Interchangeable
                • Fast / accurate auto-focus
                • Lightweight
                • Nice Bokeh
                • Rugged
                • Strong Construction

                Cons

                  Best Uses

                  • Indoors/Low Light
                  • Landscape/Scenery
                  • Weddings/Events

                  Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                  I'm a wedding photographer and I also shoot other events. Outstanding performance in low light. At 1.4 is a little soft but its very manageable. The optimal aperture is 2.2 and very sharp at 2.8. No signs of vignetting. Very quiet and fast focusing. At the optimal apertures, the images are razor sharp. Haven't found a dislikes yet.

                  • Was this a gift?:
                  • No

                  Share this review

                   
                  5.0

                  I found my perfect combination.

                  By Todd

                  from Monson, MA

                  About Me Photo Enthusiast

                  Verified Buyer

                  Pros

                  • Low Light

                  Cons

                    Best Uses

                    • Indoors/Low Light

                    Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                    You can read other reviews about autofocus speed, sharp images and color rendition. I wanted a system that would take photos indoors without a flash. Pair this lens with the Pentax K-5 and it does a wonderful job at it. I am able to take pictures of birthdays, holidays, new babies in the family all without a flash. I absolutely love it.

                    • Was this a gift?:
                    • No

                    Share this review

                     
                    5.0

                    Excellent Lens!

                    By ANC Photos

                    from Tampa, Florida

                    About Me Semi-pro Photographer

                    Verified Buyer

                    Pros

                    • Consistent Output
                    • Fast / accurate auto-focus
                    • Nice Bokeh

                    Cons

                    • NONE

                    Best Uses

                    • Indoors/Low Light
                    • Weddings/Events

                    Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                    I have been using the Sigma f/1.4 EX DG HSM on both a Pentax K20D and K-5 with excellent results. I keep the aperture at 1.4 and adjust the shutter accordingly. As a portrait photographer, this lens is a must have. Being able to get crisp eyes while softening the nose and lips with the best bokeh around.

                    • Was this a gift?:
                    • No

                    Share this review

                     
                    5.0

                    Awesome!

                    By JenSinPhoto

                    from Glen Allen, VA

                    About Me Pro Photographer

                    Verified Buyer

                    Pros

                    • Consistent Output
                    • Durable
                    • Easily Interchangeable
                    • Fast / accurate auto-focus
                    • Nice Bokeh
                    • Strong Construction

                    Cons

                      Best Uses

                      • Indoors/Low Light
                      • Weddings/Events

                      Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                      I love this lens! It's great in low-light situations and creates great images!

                      • Was this a gift?:
                      • No

                      Share this review

                      (3 of 4 customers found this review helpful)

                       
                      5.0

                      eye-glass (f1.4)

                      By jackero27

                      from south africa

                      About Me Photo Enthusiast

                      Verified Buyer

                      Pros

                      • Consistent Output
                      • Durable
                      • Fast / accurate auto-focus
                      • Nice Bokeh
                      • Serious lens

                      Cons

                      • The photographer's eye

                      Best Uses

                      • Portrait landscapes

                      Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                      i know know, after buying loads of gear, over years, that the most important product in my bag (so to speak) is the photographer's eye. much more so than the sensor or the ISO setting or the ergonomic body. and after that - and a long way after that - comes the glass. the camera's eye. the sigma f/1.4 is the best prime i ever had for my pentax cameras. it's fast and sharp and serious, many things which i am not. it is a great lens. period.

                      • Was this a gift?:
                      • No

                      Share this review

                       
                      5.0

                      Love This Lens!

                      By Trish

                      from Lake Gaston, Va

                      About Me Photo Enthusiast

                      Verified Buyer

                      Pros

                      • Consistent Output
                      • Durable
                      • Easily Interchangeable
                      • Fast / accurate auto-focus
                      • Nice Bokeh
                      • Strong Construction

                      Cons

                        Best Uses

                        • Indoors/Low Light
                        • Landscape/Scenery
                        • Portraits

                        Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                        I really enjoy this lens! I've been wanting a 50mm prime, and I had purchased another Sigma lens and love everything about Sigma. It's a joy to photograph with. It is a bit heavy, but I don't mind that at all. It has such a solid feel to it, and I like that.

                        • Was this a gift?:
                        • No

                        Share this review

                         
                        4.0

                        Formidable nifty fifty

                        By Johan

                        from Vancouver, BC

                        About Me Casual Photographer

                        Verified Buyer

                        Pros

                        • Fast / accurate auto-focus
                        • Nice Bokeh
                        • Strong Construction

                        Cons

                          Best Uses

                          • Night Photography
                          • Portraits

                          Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                          Use this lens mostly for portraits. My copy seems to front focus quite a bit wide open. I have the K-5 AF adjustment set at maximum -10 which almost solves the issue (still ~2mm BF). I haven't found that to be an issue so far in real world shooting. Also, that's pretty negligible when stepped down.

                          The lens had some raving reviews which may have affected my expectations for its sharpness at f1.4. Plenty usable in my opinion. But I stick with 2.8 and up.

                          I love the weight and the size of the lens. Gives me better balance and grip on my K-5. It's a sharp lens, with a quiet operation. Bokeh is pleasing.

                          4 stars because of the BF, large filter thread, no weather sealing.

                          • Was this a gift?:
                          • No

                          Share this review

                           
                          3.0

                          Marvellous Lens with horrible focus

                          By 13thlife

                          from Switzerland

                          About Me Photo Enthusiast

                          Verified Buyer

                          Pros

                          • Nice Bokeh

                          Cons

                          • Bad Focus
                          • Heavy

                          Best Uses

                          • Indoors/Low Light
                          • Night Photography
                          • Portraits

                          Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                          The lens has a wonderful bokeh and the colours are beautiful - but it has a bitter downside: The lens focused approximately 1/2 inch in front of the object (nearly too much for the camera - K20D - to compensate). Now it's on the way to SIGMA - and I expect them to fix it.
                          Some positive sides: The HSM is very fast, and you need nearly no light to make brilliant pictures. Also due to its full-frame compatibility there is barely any vignetting on APS/C cameras.
                          I would nevertheless recommend the lens - but be aware you might have the same problem to get solved...

                          • Was this a gift?:
                          • No

                          Share this review

                           
                          4.0

                          Great lens for the price

                          By Big Joe G

                          from Rockland New York

                          About Me Semi-pro Photographer

                          Verified Buyer

                          Pros

                          • Consistent Output
                          • Durable
                          • Easily Interchangeable
                          • Fast / accurate auto-focus
                          • Nice Bokeh
                          • Rugged
                          • Strong Construction

                          Cons

                          • Heavy

                          Best Uses

                          • Indoors/Low Light
                          • Landscape/Scenery
                          • Night Photography
                          • Sports/Action
                          • Weddings/Events
                          • Wildlife Photos

                          Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                          First off it's a solid lens, a bit heavy but it takes a beating. Fast focus and quiet. I use it with k20 and I am very happy with the results. A must for low light photography.

                          • Was this a gift?:
                          • No

                          Share this review

                           
                          5.0

                          Excellent lens !

                          By Bigsaint

                          from Vernon, NJ

                          About Me Semi-pro Photographer

                          Verified Buyer

                          Pros

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

                          Cons

                            Best Uses

                            • Indoors/Low Light
                            • Landscape/Scenery
                            • Night Photography
                            • Weddings/Events

                            Comments about Sigma 50mm f/1.4 EX DG HSM Lens for Pentax K:

                            Don't hesitate if you are considering this lens. Beautiful build, excellent IQ I have zero regrets with my purchase. I just spent a Sunday afternoon catching the last of the fall colors with my K7 and this lens, the results were superb in every regard.

                            Share this review

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                            Filters & Filter Kits

                            See more
                            Hoya - 77mm alpha MC UV Filter
                            • You Pay: $34.90
                             
                            Hoya - 77mm Digital Filter Kit II
                            • You Pay: $109.90
                             

                            Filter Holders

                            See more
                            XUME - 77mm Lens Adapter and Filter Holder Starter Kit
                            • You Pay: $53.95
                             

                            Hoods & Covers

                            See more
                            Flex Lens Shade - Flex Lens Shade
                            • You Pay: $39.95
                             

                            Cases & Wraps

                            See more
                            Pearstone - Onyx 20 Lens Case
                            • You Pay: $11.99
                             

                            Protection/Camouflage

                            See more
                            LensCoat - LensCoat for the Sigma 50mm f/1.4 DG HSM Lens (Black)
                            • You Pay: $49.99
                            Special Order ?
                            This is a Special order item. Est. arrival at B&H is 3-7 business days (subject to availability). Your order will be charged at time of shipment.
                            PayPal Orders
                            PayPal orders will be charged when the order is placed.
                            International Orders
                            For international orders, credit cards will be charged at time you place your order.
                             

                            Lens Caps

                            See more
                            Sensei - 77mm Clip-On Lens Cap
                            • You Pay: $3.95
                             
                            View all Accessories
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