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Sigma Normal 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF USA

B&H # SI5028MDGPAF Mfr # 346109
No Longer Available

To maintain high optical performance from infinity to close-up 1:1 macro photos without accessories, the Sigma 50mm f/2.8 EX DG incorporates a "Floating Internal Focusing" (FIF) system. As a result, the lens also features a non-rotating front lens group which makes it easier to work with polarizing filters, and has a focus limiter to narrow down the broad focus range.

This lens is designed as a high-quality primary macro lens, good for film or digital SLR cameras. The improved DG lens design corrects for various aberrations. This macro lens is specially coated to get the best color balance whilst cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras.

Close focus capability of 7.4"
Super Multi Layer (SML) coating reduces ghosting caused by reflections from the surface of digital image sensors
Screw-in hood also accepts a 72mm filter in the front of the lens hood
Performance
Focal Length 50mm
Aperture Maximum: f/2.8
Minimum: f/32 - 45
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 7.4" (18.80 cm)
Magnification 1x
Maximum Reproduction Ratio 1:1
Elements/Groups 10/9
Diaphragm Blades 7
Features
Image Stabilization No
Autofocus Yes
Tripod Collar No
Environmental
Physical
Filter Thread 55 mm
Dimensions (DxL) Approx. 2.8 x 2.5" (7.11 x 6.35 cm)
Weight 11 oz (312 g)
Sigma Normal 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF
  • Front & Rear Lens Caps
  • Lens Hood
  • 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/2.8 EX DG Macro Autofocus Lens for Pentax AF
     
    4.7

    (based on 10 reviews)

    Ratings Distribution

    • 5 Stars

       

      (7)

    • 4 Stars

       

      (3)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Consistent output (9)
    • Fast / accurate auto-focus (9)
    • Durable (7)
    • Strong construction (7)
    • Easily interchangeable (6)

    Cons

      Best Uses

      • Macro photography (5)
        • Reviewer Profile:
        • Semi-pro photographer (4)
        • Was this a gift?:
        • No (4)

      Reviewed by 10 customers

      Sort by

      Displaying reviews 1-10

      Back to top

       
      5.0

      This is my go-to lens

      By Ricardo

      from Pittsburgh, PA

      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
        • Macro Photography
        • Night Photography

        Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

        I love this lens. I have two other Pentax DA zooms, but this lens is mounted most often. Very crisp shots, nice bokeh and fairly fast auto focus. Build quality is a perfect match to my Pentax K-50 body wrt weight and balance.

        • Was this a gift?:
        • No

        Share this review

         
        5.0

        Perfect Macro lens

        By Tim B

        from Queens, NY

        About Me Semi-pro Photographer

        Verified Buyer

        Pros

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

        Cons

          Best Uses

          • Macro Photography
          • Wildlife Photos

          Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

          I use this lens for close-up flower photography. The auto focus features are sharp and accurate. So far I have found no flaws with this lens.

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          Very nice lens

          By Groovy

          from Quebec, Canada

          About Me Semi-pro Photographer

          Verified Buyer

          Pros

          • Consistent Output
          • Durable
          • Easily Interchangeable
          • Lightweight
          • Nice Bokeh
          • Rugged

          Cons

          • Slow Focus In Macro Mode

          Best Uses

          • Macro Photography
          • Weddings/Events

          Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

          This lens is very sharp already from f/2.8 with a little bit of softness on the extreme middle of the borders when compared to the center. Some people complain about the autofocus being slow but it's only in low light in macro mode. I usually focus manually when in macro mode using the view finder. When use as a portrait lens it focus quite fast and it haven't been a problem for me.

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          Sharp Photographs & Fast Focusing

          By John

          from Toronto, ON

          About Me Semi-pro Photographer

          Verified Buyer

          Pros

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

          Cons

          • NONE

          Best Uses

          • Macro Photography
          • Portrait photography

          Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

          A must-have lens if you want to get more into macro photography!

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          Do not judge at first sight

          By JOHN MAYSHASH

          from Bogotá - Colombia

          About Me Pro Photographer

          Verified Buyer

          Pros

          • Consistent Output
          • Durable
          • Strong Construction

          Cons

            Best Uses

            • Macro Photography

            Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

            Excellent product for close-up in macro photography.

            • Was this a gift?:
            • Yes

            Share this review

             
            4.0

            very happy

            By seasculpture

            from Australia

            About Me Semi-pro Photographer

            Pros

            • Consistent Output
            • Durable
            • Easily Interchangeable
            • Lightweight
            • Sharp Focus
            • Strong Construction

            Cons

              Best Uses

              • Macro
              • Macro and portraits
              • Macro Art

              Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

              I use this lens mainly for macro work. I could have bought a super macro lens but for the price this lens works brilliantly.

              Share this review

              (1 of 1 customers found this review helpful)

               
              4.0

              Decent, inexpensive lens

              By Kestrel1029

              from Philadelphia, PA

              About Me Photo Enthusiast

              Verified Buyer

              Pros

              • Consistent Output
              • Easily Interchangeable
              • Lightweight
              • Quick Focus
              • Sharp Focus
              • Strong Construction

              Cons

                Best Uses

                • Landscape/Scenery
                • Portraits
                • Travel

                Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

                This lens is useful in applications where a slightly longer than normal focal length is required. This lens makes a nice portrait lens for those on a budget. I was pleasantly surprised how sharp this lens is. The macro function is another nice touch. Size is also nice, not very heavy but no lightweight either. I would definitely recommend this lens. The one annoying thing about it is once you put the lens hood on you can't put the lens cap back on while the hood is on.

                Share this review

                (2 of 2 customers found this review helpful)

                 
                5.0

                50mm f/2.8 EXDG

                By colinsart

                from East Coast Australia

                About Me Semi-Professional

                Verified Buyer

                Pros

                • Consistent Output
                • Durable
                • Easily Interchangeable
                • Quick Focus
                • Rugged
                • Sharp Focus
                • Strong Construction

                Cons

                • Heavy

                Best Uses

                • General Use
                • Landscape Photography
                • Macro and portraits

                Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

                I use this lens constantly and have nothing but praise for the quality and uses for this lens. I can capture the macro shot I want and also the group of 15 kids posing at drama school.It is a little heavier than the 18-50mm Sigma I was using but I got used to the feel of it very quickly.I cannot recommend this lens too highly. Go for it![...]

                Share this review

                (1 of 1 customers found this review helpful)

                 
                4.0

                Great way to get into Macro

                By silver sun

                from denver, co

                About Me Semi-Professional

                Verified Buyer

                Pros

                • Consistent Output
                • Durable
                • Easily Interchangeable
                • Sharp Focus

                Cons

                  Best Uses

                    Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

                    This lens is a great start for anyone interested in trying out some marcro work. Auto focus can be a little awkward and slow, so use manual when you can. This is a good macro lens for the price... I'm hooked!

                    Share this review

                    (9 of 10 customers found this review helpful)

                     
                    5.0

                    Excellent value

                    By Isaac

                    from Kansas, USA

                    Comments about Sigma 50mm f/2.8 EX DG Macro Autofocus Lens for Pentax AF:

                    GENERAL USE:This being my most valuable lens, I love it. I use it forportraiture and macro, so it's kind of a dual-purpose lens. Its decently open aperture capabilities are very usefulthough. At f/2.8, it is very sharp. Right when I put it onmy *ist DL, I got excellent-quality pictures. At 1:1, it isvery beneficial to have a tripod if your subject is still. If the subject is moving (such as an ant) I usually just setit to 1:1 with manual focus and move back and forth to getphotos that are in focus. Sometimes this can be tricky,which requires patience and experience. This usually worksbest with more light, because then you can use a higheraperture with a greater DOF. I recommend a filter of somesort because if you're within 2 inches of something, youdon't want to bump the lens on a piece of metal and have itruined.FEATURES:The AF limiter is pretty handy but sometimes it gets in theway. Usually I don't use it, but the few times I do use it,I am happy that it is there. F/2.8 makes it a decent indoorlens (with or without flash), too.DESIGN:I have had no problems with the design. It is not agigantic macro lens like some of the 100mm-and-above lensesare. (When you're at 1:1, it will stick out another 3inches.) I'm not sure if it's made out of plastic or metalor another substance. It's kind of fuzzy, which makes itall the more fancy pancy. The only thing I don't like isthat the lens hood screws and takes a while to take on andoff. I usually don't use the hood, anyway.VALUE:Get it. It's an amazing value. It produces amazing-qualitypictures. I knew my kit lens (18-55mm) was somewhat sharp. Then I got this lens, put it at f/9, with my Vivitar 285hvand got EXTREMELY sharp shots, even indoors.MEETS EXPECTATIONS:Of course!

                    Expertise: Advanced Amateur

                    Problems Encountered: None so far (I've had it for about a month).A slight problem with the design is that the lens hoodscrews on, which is kind of weird.

                    Previous Equivalent Item Owned: Hmm. 18-55mm, and pentax smc 20mm

                    Items I Recommend: Protective filter

                    Share this review

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