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Bower SX4EOS 2x Telextender with 4 Lens Elements

  • Discontinued
  • B&H # BOAFC4
  • Mfr# SX4EOS

Product Highlights

  • For Use with Canon EOS Cameras

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The Bower SX4EOS 2x Telextender (also known as a tele-extender) will multiply the focal length of your existing lens by 2x, and will cut back the amount of light by 2 f/stops while maintaining full autofocus coupling.

For example, using a 2x teleconverter with a 300mm lens will effectively increase the focal length to 600mm. A lens set to f/2.8 will now be f/5.6.

Teleconverters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera's AF sensors. Manual focusing is recommended when using lenses with smaller open f-stop value than those given above.

Note! Not compatible with EF-S lenses.

Compact and lightweight
Precision engineered
Doubles the focal length of your lens while full auto coupling is maintained
10-Year warranty against defects in manufacturing
Made in Japan

REVIEW SNAPSHOT®

by PowerReviews
Bower SX4EOS 2x Telextender with 4 Lens Elements
 
3.4

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

75%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

          • Reviewer Profile:
          • Semi-pro photographer (3)
          • Was this a gift?:
          • No (3)

        REVIEWS

        Reviewed by 5 customers

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        Displaying reviews 1-5

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        (1 of 1 customers found this review helpful)

         
        3.0

        Not great thing

        By Fernando Saavedra

        from Mexico City

        About Me Semi-pro Photographer

        Verified Buyer

        Pros

        • Durable
        • Strong Construction

        Cons

        • Blurry Focus
        • Poor in Low Light

        Best Uses

          Comments about Bower SX4EOS 2x Telextender with 4 Lens Elements:

          I found it as a useless object for me, resulting images are poor in contrast and bright and some chromatic aberrations are easy to be noticed even for a novice. It's much better to buy a telephoto directly. Works ONLY with exactly "EF" lenses.

          • Was this a gift?:
          • No

          Comment on this review

           
          4.0

          Good

          By Carlos

          from São Paulo, Br

          About Me Photo Enthusiast

          Verified Buyer

          Pros

          • Easily Interchangeable

          Cons

          • Poor in Low Light

          Best Uses

          • Landscape/Scenery
          • Wildlife Photos

          Comments about Bower SX4EOS 2x Telextender with 4 Lens Elements:

          Good for the price. The AF really doesn't work with lenses 4.8 or darker. If you don't care of using the manual focus it is ok

          • Was this a gift?:
          • No

          Comment on this review

          (2 of 3 customers found this review helpful)

           
          1.0

          Research First

          By Flash

          from NC

          About Me Pro Photographer

          Verified Buyer

          Pros

            Cons

              Best Uses

                Comments about Bower SX4EOS 2x Telextender with 4 Lens Elements:

                Looks and sounds like a great product, but before ordering check to make sure you have the right lens. This extender does not work with Canon EF lens.

                • Was this a gift?:
                • No

                Comment on this review

                (4 of 4 customers found this review helpful)

                 
                5.0

                Works as expected

                By Bob

                from Oklahoma

                About Me Semi-pro Photographer

                Verified Buyer

                Pros

                • Durable
                • Easy to Use
                • Improves Function
                • Lightweight

                Cons

                • None

                Best Uses

                • Action Shots
                • Everyday Use
                • Traveling
                • Wildlife

                Comments about Bower SX4EOS 2x Telextender with 4 Lens Elements:

                It works as expected. It is tight on the camera, fairly good quality optics for the price, and enabled me to get some good shots without having to switch to my tele lens. Don't expect Life Magazine covers, but dont expect cheap quality either

                Comment on this review

                (7 of 7 customers found this review helpful)

                 
                4.0

                Good for the value line

                By Robert

                from Noble, OK

                About Me Semi-pro Photographer

                Verified Buyer

                Pros

                • Easy to Use
                • Improves Function

                Cons

                • Cheap optics

                Best Uses

                • Everyday Use
                • Traveling
                • Wildlife

                Comments about Bower SX4EOS 2x Telextender with 4 Lens Elements:

                I used this yesterday when shooting some tornado pictures. It's good for the price, and has already contributed to my freelance work. While I would definately recommend it, you need to be aware that additional optics can yield lower quality images.

                Comment on this review

                Displaying reviews 1-5

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                Care & Cleaning

                Pearstone -  Microfiber Cleaning Cloth, 18% Gray (7 x 7.9")
                  • Original: $4.99
                  • Save: $0.50
                • Price: $4.49
                 

                What's in the Box

                Bower SX4EOS 2x Telextender with 4 Lens Elements
                • Front Lens Cap
                • Rear Lens Cap
                • Lens Pouch
                • 10-Year Warranty against Defects in Manufacturing
                 
                 
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