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Vivitar 2x Teleconverter (7 Elements) for Canon EF Lenses Reviews

10 of 10 people found the following review helpful

Great Value 2x Teleconverter, March 31, 2011

NucleusAccumbens789 (Winston Salem, NC) - See all my reviews

This review is from: Vivitar 2x Teleconverter (7 Elements) for Canon EF Lenses (Electronics)

The solution to this lens is to use manual focus. As per another reviewer, for most autofocus systems to work the aperature must be 6 or greater (that means a number smaller than six). But, a 2x converter adds two f-stops to the aperature (decreases the aperature) so you must have a lens that goes no lower than f/4 for the aperature. Most zoom lenses go to somewhere are 5.3 to even higher numbers and that means that as you zoom in on a subject the autofocus will quit working. The answer is that with a teleconverter expect to use manual focus when using a zoom lens. The lens will work fine.

22 of 29 people found the following review helpful

Doesn't work with Canon EF-S lenses, December 22, 2009

Brian D (Phoenix, AZ United States) - See all my reviews

Amazon Verified Purchase

This review is from: Vivitar 2x Teleconverter (7 Elements) for Canon EF Lenses (Electronics)

Big disappointment. I did my research (I thought) prior to purchase as there are compatibility issues with all the body/lens combinations out there. Nowhere on this site, or the other sites I reviewed did it say this product is not compatible with Canon EF-S lenses. Vivitar's website is useless... currently there are no tech specs or FAQ available for this product. However, when I received the teleconverter there was a little note in the box which pointed out the incompatibility. So now I need to deal with a return and hope I'm not charged a big restocking fee.

Vivitar's site says "We make it easy!" Don't believe it.

› See both customer reviews...

Product Description

This Vivitar 2x Teleconverter is the ideal accessory for any photographer looking to get closer to the action and capture distant images. With this simple attachment, you'll be able to double the focal length of any lens, making it much easier to photograph far away subjects. In addition, because the depth of field is cut in half, this Teleconverter will make it easy to achieve sharp focus with attractive background blur.

This Teleconverter contains seven precision-crafted elements for high-quality image resolution, reduction of internal reflection, and minimal flare. In addition, AF operation is maintained on most cameras when the attached lens has an aperture of f/3.5 or faster. Otherwise, this Teleconverter can be used in MF mode.