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Vivitar Series 1 Teleconverter for Pentax (7 Elements)

B&H # VITC2X7P Mfr # VIV2X7P
No Longer Available
Product Highlights
  • 7 Elements
  • High Definition
  • Multi-Coated Optical Glass
  • Increases Focal Length by 2x
  • Suppresses Aberration
  • Anti-Reflective Coating
  • Pentax Mount
  • Lifetime Warranty

The Vivitar Series 1 Teleconverter for Pentax (7 Elements) with a Pentax mount effectively doubles the focal length of your lens, maintaining its resolution and contrast. The optical design featuring 7 elements yields superior field flatness and edge sharpness compared to converters with fewer elements. The lens elements have an anti-reflective coating which reduces flare and aberrations.

This teleconverter 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 values than those given above.

Multi-coated Optical Glass with anti-reflection coating
Doubles focal length of lenses
Manufacturer's Lifetime Warranty
Vivitar Series 1 Teleconverter for Pentax (7 Elements)
  • Case
  • Protective Lens Cap
  • Manufacturer's Lifetime Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    VivitarSeries 1 Teleconverter for Pentax (7 Elements)
     
    3.7

    (based on 3 reviews)

    Ratings Distribution

    • 5 Stars

       

      (0)

    • 4 Stars

       

      (2)

    • 3 Stars

       

      (1)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

      Cons

        Best Uses

        • Macro photography (3)
          • Reviewer Profile:
          • Photo enthusiast (3)

        Reviewed by 3 customers

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        (0 of 1 customers found this review helpful)

         
        4.0

        Perfect fo me!

        By Martod

        from San Diego, CA

        About Me Photo Enthusiast

        Verified Buyer

        Pros

        • Consistent Output
        • Durable
        • Easily Interchangeable
        • Rugged
        • Strong Construction

        Cons

        • Poor in Low Light

        Best Uses

        • Landscape/Scenery
        • Macro Photography
        • Sports/Action
        • Wildlife Photos

        Comments about Vivitar Series 1 Teleconverter for Pentax (7 Elements):

        It works fine with my lensese.

        • Was this a gift?:
        • Yes

        Share this review

        (9 of 9 customers found this review helpful)

         
        4.0

        does the job

        By PDSPIX

        from Virginia

        About Me Photo Enthusiast

        Verified Buyer

        Pros

        • Durable
        • Easily Interchangeable
        • Lightweight
        • Strong Construction

        Cons

        • Limited autofocus ability

        Best Uses

        • Macro Photography
        • Wildlife Photos

        Comments about Vivitar Series 1 Teleconverter for Pentax (7 Elements):

        I bought this converter primarily to enhance my macro work though it also does a decent job of extending the range of my 55-300mm zoom. Image quality seems good, though I'm still in the early stages of testing things out. Definitely benefits from the use of a sturdy tripod under both scenarios. For macro use (with a 1:1 macro lens) the DOF is razor thin and for extending the range of my zoom, the slightest movement will cause blurring of the image. Neither is a surprise.

        Would rate it 5 stars if autofocus worked reliably with my zoom, but as I use manual focus for all of my macro work and that was my primary motivation for buying the converter, I'm not overly bothered. The description/instructions for the product DO specify this limitation, so in all fairness, I knew this issue in advance.

        With the above caveats, would certainly recommend.

        • Was this a gift?:
        • No

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        (4 of 6 customers found this review helpful)

         
        3.0

        OK teleconverter

        By Tjom

        from Norway

        About Me Photo Enthusiast

        Verified Buyer

        Pros

        • Easy to Use
        • Lightweight

        Cons

        • Not Functional

        Best Uses

        • Macro Photography
        • Wildlife

        Comments about Vivitar Series 1 Teleconverter for Pentax (7 Elements):

        It fits to all my lenses, that is real nice.
        But the AF function doesn't work with SCM lenses.
        Therefore I can only use AF on my old macro-lens.
        That annoys me some!

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