4 Element 2X Teleconverter For Canon

by Bower

Product Details

• Shipping Weight: 1 pounds (View shipping rates and policies)
• ASIN: B000J6AVQ8
• Item model number: SX4EOS
• Average Customer Review: 3.0 out of 5 stars  See all reviews (12 customer reviews)
• Date first available at Amazon.com: November 30, 2006

Product Description

4 Element 2X Teleconverter For Canon

Customer Reviews

Most Helpful Customer Reviews

41 of 41 people found the following review helpful:

3.0 out of 5 stars Autofocus problem is not a problem, January 30, 2008

By 

Kent Lee (Decorah, IA USA) - See all my reviews
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This review is from: 4 Element 2X Teleconverter For Canon (Electronics)

Some people have complained about autofocus problems. After reading a little about this, people must understand that 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.

38 of 38 people found the following review helpful:

4.0 out of 5 stars Performs as expected, June 11, 2007

By 

F. Yuhico (Manila, Philippines) - See all my reviews
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This review is from: 4 Element 2X Teleconverter For Canon (Electronics)

First off let me say that South Bay Camera handled my order very well. I really chose a teleconverter based on price. With that in mind I am very satisfied with the product. I confirm what other reviewers mentioned that the AF "hunts" for a focus at higher magnifications so I had to use manual focus. Other than that, I had no other problems with it. FYI, I used the converter on my Canon 75-300mm f4-5.6 III and my kit lens (18-55mm). It worked on both.

17 of 17 people found the following review helpful:

3.0 out of 5 stars Good image quality poor auto focus, April 7, 2007

By 

N. T. Blanchard - See all my reviews
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This review is from: 4 Element 2X Teleconverter For Canon (Electronics)

I use this teleconverter with the Canon rebel XTI and the Canon EF 75-300 f4-5.6 III USM lens. The image quality is fine but the autofocus is poor. The lens (with the teleconverter) focuses very slowly at focal lengths under 270mm and at full 300mm it will not autofocus at all. Manual focus works just fine.