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Sigma500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF
 
5.0

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (0)

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    (0)

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    (0)

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    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (4)
  • Durable (3)

Cons

    Best Uses

        • Reviewer Profile:
        • Enthusiast (3)
        • Was this a gift?:
        • No (3)

      Reviewed by 5 customers

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      Displaying reviews 1-5

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      5.0

      Great Lens!

      By Pentax Shooter

      from Rio Grande Valley, Texas

      About Me Hobbyist/Enthusiast

      Verified Buyer

      Pros

      • Durable
      • Easy To Use
      • Reliable

      Cons

        Best Uses

          Comments about Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF:

          I've testing this lens for a week now and I cannot find any faults with it. I use it on my Pentax K-3 for wildlife photography. The lens is tack sharp at f4.5 through f11. On Pentax equipment,the lens does not have Sigma's HSM technology but autofocuses using the older screw-drive technology. I don't know the reason for this but I found the autofocus to be fast and accurate. I believe it's as fast as my Pentax DA lenses. Added bonus: I use the Pentax 1.4 DA teleconverter with this lens making it a 700mm f6.3. All autofocus functions are retained and I see no loss of image quality when using it.

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          5.0

          Awsome lens

          By Jerry

          from Virginia

          Comments about Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF:

          This lens is everything I expected. I'll have a great time shooting birds and wildlife. Also, the service is always top notch from B&H.

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          (5 of 5 customers found this review helpful)

           
          5.0

          very nice -- sigma f/4.5

          By oeriies

          from setauket, new york

          About Me Hobbyist/Enthusiast

          Verified Reviewer

          Pros

          • Durable
          • Easy To Use
          • Lightweight
          • Sharp
          • Value

          Cons

            Best Uses

            • Wildlife

            Comments about Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF:

            This is a very sharp lens. I have a lot of excellent lenses in my kit, including Pentax DA* and FA limiteds, but this is by far the best piece of glass.

            For birders, this on a Pentax K-5 is arguably the best thing going. It is a pound or two lighter and thousands of dollars less expensive than the Nikon or Canon OEM 500mm lenses. And thanks to Pentax in-body shake reduction and the relatively light weight I can hike a couple of miles with it on a BlackRapids shoulder harness without having to take aspirin that night (I'm an older guy) and fire off hand-held shots with ease and accuracy.

            It is unfortunate that Sigma charges the same for the Pentax version as the Nikon and Canon versions, which have image stabilization and ultrasonic moters, whereas the Pentax model has screw drive and no built-in IS. But the Pentax version works as well and doesn't weigh as much so despite the downgraded features it is a winner. The lens performs very well with a Tamron 1.4x Pz-AF teleconverter, giving a reach on a APS-C sensor of a bit more than a 1000mm equivalent on a full frame camera.

            On the negative side, the lens case is of high quality but basically useless everyday because the lens hood has to be removed and reversed to fit and the strap is cosmetic rather than functional. The lens foot/handle is a couple of inches shorter than desirable for balancing the lens on a monopod/tripod with a camera attached. Finally, the lens will not take a front UV filter so to protect this puppy you need to keep the hood permanently in place.

            But these are quibbles. You won't be sorry if you buy this lens.

            • Was this a gift?:
            • No

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            (3 of 3 customers found this review helpful)

             
            5.0

            Wow

            By Birdsrus

            from Australia

            About Me Semi-Professional

            Verified Reviewer

            Pros

            • Durable
            • Easy To Use
            • Reliable

            Cons

              Best Uses

              • Environmental
              • Everyday use
              • Law enforcement
              • Wildlife

              Comments about Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF:

              It has taken a long time to take this glass from my wish list to reality. I am still going wow every time I use it. It is much, much better than any long telephoto I have owned. I am stunned by the detail that comes up in dark bird feathers. It is a magic match with the Pentax K5. It has taken my telephoto photography a massive leap forwards.

              I am very satisfied with the screw focusing and focusing speed is faster than i expected. I would think manual focusing would be a breeze.

              I was expecting it to be much heavier and more difficult to hold. It has a solid handle that one can grip with their full hand. As yet i have not bothered putting it on a tripod or monopod. I find I can hand hold and if I can I will rest my arm on something.

              I was expecting a plastic lens shade, however it is solid metal and a thumb screw makes sure it does not slip off.

              I would think that it is no where near weather proof and rain could easily get in. I think the black coating will scuff up quickly.

              I suspect the lens will present 3 problems:
              1. taking it on aircarft with the rest of my kit
              2. where to put in in my car so I can have easy access.
              3. what i will match it with when 500mm is too long.

              I think I am happy to live with these problems.

              • Was this a gift?:
              • No

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              (5 of 5 customers found this review helpful)

               
              5.0

              Serious Telephoto Lens

              By dadipentak

              from Baltimore, MD

              About Me Hobbyist/Enthusiast

              Verified Buyer

              Pros

              • Easy To Use
              • Lightweight

              Cons

              • Expensive

              Best Uses

              • Wildlife Photography

              Comments about Sigma 500mm f/4.5 EX DG APO Autofocus Lens for Pentax AF:

              I'm still in the get-acquainted stage but there's no doubt this is a serious state-of-the-art telephoto. It's useably sharp wide-open and very sharp from f5.6 up. Color rendering and bokeh are very nice. For a 500mm, it's remarkably easy to handle and I love that you can rotate the (included) CPL filter. The only thing it's missing IMHO is a focus limiter.

              • Was this a gift?:
              • No

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