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Kenko Teleplus PRO 300 AF 3x Teleconverter for Canon EOS

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Product Description
The PRO 300 converter is made with high quality multicoated optical glass supplied by Hoya corporation, the worlds largest manufacturer of optical glass. The PRO 300 3x is designed to be used with lenses of 50mm or above, and work best with telephoto lenses of 100mm to 500mm. The PRO 300 can be used with telephoto zoom lenses as well as prime lenses, but, due to their design, Kenko does not recommend them for lenses that have a zoom range that starts under 50 mm. Important: Due to the 3 stop light loss inherent in a 3x converter Kenko states that the PRO 300 3x converter will not auto focus with lenses that have a smaller aperture than f/2.8. With all lenses having apertures smaller than f/2.8 Kenko recommends using the PRO 300 3x in manual focus mode.

Kenko Teleplus PRO 300 AF 3x Teleconverter for Nikon AF D (works af with lenses f/2.8 or faster - except with afs/afi lenses where it's mf only)

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Kenko Teleplus PRO 300 AF 1.4x Teleconverter for Canon EOS

Product Description
KENKO Teleplus Pro 300 converters are made with high quality multicoated optical glass supplied by Hoya corporation, the worlds largest manufacturer of optical glass. This glass will match the optical quality of the prime lens (even at the edges, unlike many teleconverters on the market today). The optical design of the elements and light path is wide enough not to cause any vignetting. They are designed specifically to be use with telephoto lenses of 100mm or above, and work best with telephoto lenses of 200mm to 500mm. The PRO 300's can be used with telephoto zoom lenses as well as prime lenses, but, due to their design, Kenko does not recommend them for lenses that have a zoom range that starts under 50 mm. Kenko PRO 300 converters are intended to be used with expensive telephoto lenses and larger camera bodies. They have all metal lens mounts in both front and rear, as well as a metal core, to support today's heavy professional camera bodies. Kenko PRO 300 AF teleconverter will not auto focus with the following lenses: Canon EF 50mm f/2.5 Macro, Canon EF 100mm f/2.8 Macro, Canon EF 85mm f/1.8 USM, Canon EF 300mm f/4 IS USM.

Kenko Teleplus PRO 300 AF 1.4x Teleconverter for Minolta Maxxum

Kenko Teleplus PRO 300 AF 2x Teleconverter for Minolta Maxxum

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Product Description
KENKO Teleplus Pro 300 converters are made with high quality multicoated optical glass supplied by Hoya corporation, the worlds largest manufacturer of optical glass. This glass will match the optical quality of the prime lens (even at the edges, unlike many teleconverters on the market today). The optical design of the elements and light path is wide enough not to cause any vignetting. They are designed specifically to be use with telephoto lenses of 100mm or above, and work best with telephoto lenses of 200mm to 500mm. The PRO 300's can be used with telephoto zoom lenses as well as prime lenses, but, due to their design, Kenko does not recommend them for lenses that have a zoom range that starts under 50 mm.Kenko PRO 300 converters are intended to be used with expensive telephoto lenses and larger camera bodies. They have all metal lens mounts in both front and rear, as well as a metal core, to support today's heavy professional camera bodies.