Sigma Teleconverters at a Glance

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Keep Sigma teleconverters in mind when selecting lenses for your camera. 2X teleconverters are more popular and powerful. 1.4X teleconverters are more useful and often have less distortion too. 3X teleconverters are rarely used anymore, as they have so much image degrading effect as to be worse than simply enlarging a smaller image. Teleconverters work much better on telephoto lenses (200mm and up) than on shorter focal length lenses and typically work better on prime lenses than on zoom lenses. With a 1.4X teleconverter, you lose a stop of light. So an 135 f/2.8 lens becomes the equivalent of a 190mm f/4. A 200mm f/4 becomes a 280mm f/5.6 equivalent. With a 2X teleconverter, your 135mm f/2.8 becomes 270mm f/5.6 and your 200mm f/4 is a rather slow 400mm f/8 equivalent. You can also convert your 50mm f/1.8 into a 100mm f/3.5 using a 2X. teleconverter

Sigma Teleconverters

Sigma APO Teleconverter 1.4x EX DG for Canon Mount Lenses
Sigma APO Teleconverter 1.4x EX DG
for Canon Mount Lenses
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Sigma APO Teleconverter 1.4x EX DG for Canon Mount Lenses
Sigma APO Teleconverter 1.4x EX DG
for Pentax Mount Lenses
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Sigma APO Teleconverter 2x EX DG for Nikon Mount Lenses.
Sigma APO Teleconverter 2x EX DG
for Pentax Digital SLR Cameras
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Sigma APO Teleconverter 1.4x EX DG for Canon Mount Lenses
Sigma APO Teleconverter 1.4x EX DG
for Minolta and Sony Mount Lenses
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See also