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Pentax smc DA 50mm f/1.8 Lens

Price: $246.95
Instant Savings: $65.00
You Pay: $181.95
Product Highlights
  • Very Fast f/1.8 Maximum Aperture
  • Excellent Low-Light Lens
  • Pleasing Bokeh (Out-of-Focus Areas)
  • SP Coating Repels Dust, Water, Grease
  • For APS-C Digital K-Mount Cameras

The smc DA 50mm f/1.8 Lens from Pentax is a fast f/1.8 lens for cameras with a Pentax K mount. Mounted to a camera with an APS-C sensor, this lens gives an angle of view equivalent to a 76.5mm telephoto lens--ideal for portraits. The wide f/1.8 aperture makes this an essential lens for working in low light, and it also delivers beautiful bokeh (the out-of-focus portion of a photograph). This lightweight (4.3 oz) lens is very compact--just 1.5" (3.8 cm) long. The addition of Pentax Super Protect (SP) coating to the lens helps prevent dust, water, grease and other substances from attaching themselves to a lens and degrading image quality.

Very fast f/1.8 maximum aperture is ideal for low light situations and produces pleasing bokeh in the out-of-focus areas of a photograph
76.5mm telephoto equivalent in APS-C format
The lens is treated with the Pentax's original SP (Super Protect) coating, which repels dust, water, grease, and other substances that may adhere to the surface of the lens. The protective coating promotes trouble-free use in all kinds of shooting situations.
Performance
Focal Length 50mm
Comparable APS-C Focal Length: 76.5 mm
Aperture Maximum: f/1.8
Minimum: f/22
Camera Mount Type Pentax K
Format Compatibility Pentax Digital (APS-C)
Angle of View 31.5°
Minimum Focus Distance 1.48' (45.11 cm)
Magnification 0.15x
Elements/Groups 6/5
Diaphragm Blades 7
Features
Image Stabilization No
Autofocus Yes
Tripod Collar No
Physical
Filter Thread Front:52 mm
Dimensions (DxL) Approx. 2.5 x 1.5" (6.35 x 3.81 cm)
Weight 4.3 oz (122 g)
Pentax smc DA 50mm f/1.8 Lens
  • Front and Rear Lens Caps
  • 1-Year Limited Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    Pentaxsmc DA 50mm f/1.8 Lens
     
    4.6

    (based on 70 reviews)

    Ratings Distribution

    • 5 Stars

       

      (45)

    • 4 Stars

       

      (21)

    • 3 Stars

       

      (4)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    95%

    of respondents would recommend this to a friend.

    Pros

    • Lightweight (58)
    • Nice bokeh (51)
    • Fast / accurate auto-focus (47)
    • Consistent output (37)
    • Easily interchangeable (34)

    Cons

    • Weak casing (9)
    • Plastic mount (5)
    • Slow focus (3)

    Best Uses

    • Low light (50)
    • Landscape/scenery (30)
    • Night photography (26)
    • Weddings (26)
    • Sports/action (7)
      • Reviewer Profile:
      • Photo enthusiast (34), Semi-pro photographer (14), Casual photographer (10), Pro photographer (5), Photography student (4)
      • Was this a gift?:
      • No (63)

    Most Liked Positive Review

     

    Great budget prime

    Bought this as the first prime lens for my new Pentax K-5 system. The first thing that struck me when I used it was how noisy the auto focus was. Guess years of...Read complete review

    Bought this as the first prime lens for my new Pentax K-5 system. The first thing that struck me when I used it was how noisy the auto focus was. Guess years of Canon USM has spoiled me. After that auditory shock though, it was all uphill. The focusing is spot on on my K-5, and it is sharp from wide-open as far as I can tell. The Bokeh is nice too - much better than the Canon EF 50 F/1.8. But then that lens is half the price!I like the build and the design of the lens... solid plastic and compact. The plastic mount doesn't bother me... but yeah for $ + one could expect a metal mount.But we are paying for the Pentax clarity and contrast...both of which are there in loads. I think the bigger decision for potential buyers should be this against the trusty Pentax FA 50 F/1.4. You can get used copies of the same for the cost of a new 50 F/1.8. I decided for the new 1.8 because I believe that technology becomes better with time. Why buy old when one can buy new? ;) So far - haven't been disappointed.

    VS

    Most Liked Negative Review

     

    Plastic Fantastic

    It is noticably soft wide open, so don't buy it for the speed. It's decent when stopped down to f2.8; by f5.6 it's as sharp as anything. Auto focus is VERY loud but...Read complete review

    It is noticably soft wide open, so don't buy it for the speed. It's decent when stopped down to f2.8; by f5.6 it's as sharp as anything. Auto focus is VERY loud but quick.

    The lens mount is plastic so I doubt it would stand up to heavy use. I honestly don't have a problem with the rest of the plastic. Structurally it seems sturdy enough, and plastic is probably more thermally stable than metal anyway. The mount though, should be a little tougher, in my opinion.

    This one was included with the K-3 by B&H, so I'm grateful to have it and it will see some use, but overall it isn't as good as other normal primes. I'd say it's worth having in the bag just because it weighs next to nothing.

    Reviewed by 70 customers

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    Displaying reviews 1-20

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    5.0

    Great Lens

    By Sam

    from Boston, MA

    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 Pentax smc DA 50mm f/1.8 Lens:

      I highly recommend having this lens with you at all times. This lens is awesome, especially for the price. Takes awesome images with nice bokeh. Have this lens on my camera (K-5iis) nearly all the time.

      • Was this a gift?:
      • No

      Share this review

       
      5.0

      Beautiful and sharp photos

      By Audrey

      from KY

      Comments about Pentax smc DA 50mm f/1.8 Lens:

      I love this lens, and it is my favorite. It takes very clear and sharp and colorful photos. Lens of choice. I recommend it!!

      Share this review

       
      5.0

      Gem Of A Lens

      By Rick the Click

      from Tallahassee, FL

      About Me Photo Enthusiast

      Verified Buyer

      Pros

      • Consistent Output
      • Easily Interchangeable
      • Fast / accurate auto-focus
      • Lightweight
      • Nice Bokeh

      Cons

        Best Uses

        • Indoors/Low Light
        • Landscape/Scenery
        • Night Photography
        • Video

        Comments about Pentax smc DA 50mm f/1.8 Lens:

        This small lens weighs little and is bright and sharp. I find this lens a joy to use. Focus makes
        just a slight sound and is fairly quick. If you are
        going Pentax, this is a good one to have in your bag. Absolutely no kidding, I LIKE THIS LENS!

        • Was this a gift?:
        • No

        Share this review

         
        4.0

        the value proposition

        By Pentax fan

        from Atlanta, GA

        About Me Photo Enthusiast

        Verified Buyer

        Pros

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

        Cons

          Best Uses

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

          Comments about Pentax smc DA 50mm f/1.8 Lens:

          this is a plastic lens (except for the glass obviously) but is well made and exudes quality. very sharp, able to render nice out of focus regions, fast AF (if a bit noisy but not objectionable). I'm glad i got it, especially bundled with a K5iis for $[$]which is a screaming bargain.

          • Was this a gift?:
          • No

          Share this review

           
          5.0

          Excellent Lens for the price

          By Nathan

          from Stanford, CA

          About Me Photography Student

          Verified Buyer

          Pros

          • Consistent Output
          • Easily Interchangeable

          Cons

          • plastic mount
          • Screw Drive

          Best Uses

          • Indoors/Low Light
          • Portraiture

          Comments about Pentax smc DA 50mm f/1.8 Lens:

          For the price, this is an excellent lens, though I would've preferred to see an internal motor rather than the screw-drive. The plastic mount shouldn't push you away unless you're planning on ripping it from your camera; in which case I think you have bigger problems to deal with.

          • Was this a gift?:
          • No

          Share this review

          (1 of 1 customers found this review helpful)

           
          5.0

          Value beyond the realm

          By Brendan

          from Portland, OR

          About Me Photo Enthusiast

          Verified Buyer

          Pros

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

          Cons

            Best Uses

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

            Comments about Pentax smc DA 50mm f/1.8 Lens:

            It's rare to find values like this lens these days. I spent hours researching which prime lenses I would order along with my K-5iis and K-50. After reading many reviews, I came across the DxO Mark ratings for best lenses for the K-5iis. The DA 50mm 1.8 is in the top 3. The 35mm DA L F2.4 is right up there too. Sold! Yes, they are noisy, and they have a plastic mounting ring, but they feel well made for what they are. The quality of the images they produce, are far and beyond the realm that their price conveys.

            • Was this a gift?:
            • No

            Share this review

             
            4.0

            Fast Little Lens

            By Dave

            from Ft. Myers, FL. Gloucester, MA.

            About Me Semi-pro Photographer

            Verified Buyer

            Pros

            • Consistent Output
            • Easily Interchangeable
            • Fast / accurate auto-focus
            • Lightweight

            Cons

              Best Uses

              • Indoors/Low Light
              • Landscape/Scenery

              Comments about Pentax smc DA 50mm f/1.8 Lens:

              This lens is compact and sharp. It's considerably smaller than my old SMC Pentax 50mm f1.4. But then I have a number of f 2.8 zooms that cover that focal length and so don't use a fixed focal length very often. My only complaint, and it doesn't matter that often, is that the focusing motor is noisy.

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              good cheap lens

              By sf

              from ashland, OR

              About Me Photo Enthusiast

              Pros

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

              Cons

              • No Bayonet For A Hood

              Best Uses

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

              Comments about Pentax smc DA 50mm f/1.8 Lens:

              It's very difficult to complain about this lens, which came bundled with my k3. In a time when all the manufacturers seem to be relentlessly pushing their lenses up-market and raising prices through the roof (Sigma is now getting [$] for a 50?), it's great to be able to have the option of an affordable 50. Yes, it's plastic and is a little noisy, but the image quality is excellent (one side-by-side comparison on the net shows it to better the Pentax 50 1.4). It's perfect for shooting the kids and anything else--I find the focal length the most useful of any lens. My only grip is that they could have designed in a bayonet-style lens hood mount (52mm thread, no bayonet), but you can always pick up a cheap threaded one. So far, it seems well-made.

              • Was this a gift?:
              • No

              Share this review

               
              5.0

              Beautiful lens!

              By Ivan

              from MD

              About Me Photo Enthusiast

              Verified Reviewer

              Pros

                Cons

                  Best Uses

                    Comments about Pentax smc DA 50mm f/1.8 Lens:

                    Best lens you can find for the $

                    • Was this a gift?:
                    • No

                    Share this review

                     
                    5.0

                    Love it!

                    By I want more

                    from Porterville, CA

                    About Me Semi-pro Photographer

                    Verified Buyer

                    Pros

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

                    Cons

                      Best Uses

                        Comments about Pentax smc DA 50mm f/1.8 Lens:

                        Since I purchased this it has not left my camera. It works well in lowlight and gives nice clear images. Now I'm saving up for my next glass purchase. This lens will stay part of my kit!

                        Share this review

                         
                        3.0

                        Plastic Fantastic

                        By blurGasm

                        from Worcester, MA

                        About Me Semi-pro Photographer

                        Verified Reviewer

                        Pros

                        • Lightweight

                        Cons

                        • plastic mount
                        • Soft wide open

                        Best Uses

                        • Landscape/Scenery

                        Comments about Pentax smc DA 50mm f/1.8 Lens:

                        It is noticably soft wide open, so don't buy it for the speed. It's decent when stopped down to f2.8; by f5.6 it's as sharp as anything. Auto focus is VERY loud but quick.

                        The lens mount is plastic so I doubt it would stand up to heavy use. I honestly don't have a problem with the rest of the plastic. Structurally it seems sturdy enough, and plastic is probably more thermally stable than metal anyway. The mount though, should be a little tougher, in my opinion.

                        This one was included with the K-3 by B&H, so I'm grateful to have it and it will see some use, but overall it isn't as good as other normal primes. I'd say it's worth having in the bag just because it weighs next to nothing.

                        • Was this a gift?:
                        • No

                        Share this review

                         
                        3.0

                        Great optics, so-so build

                        By beemac

                        from NorCal

                        About Me Photo Enthusiast

                        Verified Buyer

                        Pros

                        • Consistent Output
                        • Easily Interchangeable
                        • Fast / accurate auto-focus
                        • Lightweight

                        Cons

                        • Weak Casing

                        Best Uses

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

                        Comments about Pentax smc DA 50mm f/1.8 Lens:

                        This was bundled with a K-3. I didn't need another 50mm lens, but I'm happy with the picture quality from this one. Too bad they didn't equip it with a decent lens hood and a metal mount.

                        • Was this a gift?:
                        • No

                        Share this review

                         
                        4.0

                        nice addition to my lens collection

                        By Franny the Photographer

                        from Seattle, WA

                        About Me Semi-pro Photographer

                        Verified Buyer

                        Pros

                        • Consistent Output
                        • Easily Interchangeable
                        • Fast / accurate auto-focus
                        • Lightweight
                        • Nice Bokeh

                        Cons

                          Best Uses

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

                          Comments about Pentax smc DA 50mm f/1.8 Lens:

                          This lens is so light and portable I love it! I initially purchased the Sigma 50 mm f/1.4 lens which is probably higher quality but so large and heavy I knew it would get left behind. The quality of the Pentax f/1.8 is great and it fits easily in my camera bag with my 18-250mm & 18-50mm f/2.8 lenses

                          • Was this a gift?:
                          • No

                          Share this review

                           
                          4.0

                          Plastic Fantastic

                          By Shoot Like A Pro

                          from Billings, MT

                          About Me Photo Enthusiast

                          Verified Buyer

                          Pros

                          • Easily Interchangeable
                          • Fast / accurate auto-focus
                          • Lightweight

                          Cons

                            Best Uses

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

                            Comments about Pentax smc DA 50mm f/1.8 Lens:

                            It may be made of plastic but this is a nice sharp lightweight lens.

                            • Was this a gift?:
                            • No

                            Share this review

                             
                            4.0

                            Great Little Lens

                            By Greg

                            from Hayward, CA

                            About Me Photo Enthusiast

                            Verified Buyer

                            Pros

                            • Consistent Output
                            • Easily Interchangeable
                            • Fast / accurate auto-focus

                            Cons

                              Best Uses

                              • Landscape/Scenery

                              Comments about Pentax smc DA 50mm f/1.8 Lens:

                              This lens came as part of the K-3 package to my surprise I found it to be a great little lens. The focus is very fast and produces very clear images, I think I'll keep it.

                              • Was this a gift?:
                              • No

                              Share this review

                               
                              5.0

                              good starting lense

                              By Dan

                              from Lynn, MA

                              Comments about Pentax smc DA 50mm f/1.8 Lens:

                              Good price, good images, very sharp.

                              Share this review

                              (0 of 1 customers found this review helpful)

                               
                              3.0

                              Decent for price

                              By pmgrnvl

                              from South Carolina

                              About Me Pro Photographer

                              Verified Buyer

                              Pros

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

                              Cons

                              • plastic mount

                              Best Uses

                              • Landscape/Scenery
                              • Weddings/Events

                              Comments about Pentax smc DA 50mm f/1.8 Lens:

                              This is a solid little lens, though the plastic mount is a bit of a disappointment. Still, for the price and the 1.8 aperture, it's not bad. It came free as part of a kit; I used it just to try it out and was quite surprised by the feel of the lens and the optics. No, it's not a pro-grade piece of glass. But then again, neither is it priced that way.

                              • Was this a gift?:
                              • No

                              Share this review

                              (1 of 1 customers found this review helpful)

                               
                              4.0

                              Highly impressed with this lens

                              By Harm

                              from Omaha, NE

                              About Me Photo Enthusiast

                              Verified Buyer

                              Pros

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

                              Cons

                              • Loud AF
                              • Loud Autofocus
                              • Not Weather-resistant

                              Best Uses

                              • Indoors/Low Light
                              • Landscape/Scenery
                              • Portraits

                              Comments about Pentax smc DA 50mm f/1.8 Lens:

                              Don't let the plastic build keep you away. This is one nice and affordable prime. Images are sharp and focus is quick. It's also very light. That being said, it is quite loud - definitely the loudest lens I have. The picture quality all but makes up for it though. Especially when the lighting is right. Compared to the all manual "Nifty" from an old K1000, this lens seems to have a higher tendency for purple fringing than I'm used to in a 50mm. That being said, I am still highly impressed in this lens.

                              • Was this a gift?:
                              • No

                              Share this review

                               
                              4.0

                              love this lens!

                              By CPRowe

                              from Salt Lake City, UT

                              About Me Pro Photographer

                              Verified Buyer

                              Pros

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

                              Cons

                                Best Uses

                                • Indoors/Low Light

                                Comments about Pentax smc DA 50mm f/1.8 Lens:

                                You would never know this is not one of Pentax's high-end lenses. It's awesome - the clarity, depth of field, etc. Great for low-light situations and the depth of field is beautiful for portraits. Great buy for the money!

                                • Was this a gift?:
                                • No

                                Share this review

                                 
                                5.0

                                Great portrait and general use lens

                                By TBAR

                                from Savannah, GA

                                About Me Photo Enthusiast

                                Verified Buyer

                                Pros

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

                                Cons

                                  Best Uses

                                  • Indoors/Low Light
                                  • Macro Photography
                                  • Portraiture
                                  • Weddings/Events

                                  Comments about Pentax smc DA 50mm f/1.8 Lens:

                                  Excellent image quality, compact, fast, excellent autofocus and auto-exposure. Ueasy to use.

                                  • Was this a gift?:
                                  • No

                                  Share this review

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