|  | Best Sellers | |  | | Opteka T-Mount Adapter for Canon EOS Rebel T3i, T3, T2i, T1i, XS, XSi, XTi, XT, 60D, 50D, 40D, 30D, 20D, 7D, 5D, & 1D Digital SLR Cameras | | $13.95 | | |
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| | Home » » » | | | | | | Product Promotions: | | | | | Product Details: | | | Product Weight:
| 0.32 pounds | | Package Length:
| 3.8 inches | | Package Width:
| 3.8 inches | | Package Height:
| 3.7 inches | | Package Weight:
| 0.7 pounds | | Average Customer Rating:
|  based on 42 reviews |
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| | Customer Reviews: | |
Average Customer Review:
 ( 42 customer reviews )
Write an online review and share your thoughts with other customers.
Most Helpful Customer Reviews
17 of 17 found the following review helpful:
 Great match-up with the Sigma 70-200, f2.8 that gives you a 100-300, f4 zoomJul 14, 2007
By Paul Johnson
"pfjbaldwin"
Optically outstanding when combined with the Sigma 70-200 f2.8 EX DG. This new Sigma EX DG lens and converter is super sharp and great color that stacks up to the famed Canon L series at about 60% of the cost. I see incredible clarity at 800% magnification doing touch ups in Photoshop.
I've used both and wouldn't hesitate a second buying the Sigma DG series again.
Advanced amateur who loves Canon.
9 of 9 found the following review helpful:
Great alternative to extend the reach of your Sigma telephoto lensNov 03, 2009
By Enche Tjin
I get the Sigma Teleconverter 1.4X especially for outdor sport games. I have Nikon D700 & D90 and Sigma 70-200mm f/2.8 HSM. I feel that 70-200mm f/2.8 is too short on D700 (full frame) and D90 (1.5x crop), therefore i get this teleconverter. It is a good alternative because it is much cheaper than buying 300mm f/2.8 or 100-300mm f4 lens.
Build quality
Build quality is the same as typical Sigma EX (professional line lens) and very well match with Sigma 70-200mm f/2.8 HSM.
COMPATIBILITY
Sigma teleconverter 1.4 only works with Sigma lenses. There are about a dozen compatible lens, but only a few retain auto focus function. There are: Sigma 180mm macro f/3.5 EX HSM, Sigma 300mm f/2.8 EX HSM, and Sigma 70-200mm f/2.8 EX HSM.
AUTO FOCUS PERFORMANCE
I don't feel any difference in auto focus performance, so it remain excellent.
IMAGE QUALITY
It loses a bit of contrast and sharpness, but generally still very good. Check out sample images from my web blog. You can get the address from my Amazon profile.
CONCLUSION
Sigma teleconverter 1.4x is a great affordable alternative for Sigma telephoto lens' user, especially for those who need extra reach. It does not sacrifice auto focus performance and only degrade a little bit of image quality. But remember that the maximum aperture will be smaller by one stop. So it might not be very good alternative if you shooting in low light like night sports.
8 of 8 found the following review helpful:
Excellent add onMay 29, 2008
By Philip Loria
For the past year I have used mine on a regular basis with my Sigma 150 macro lens. This creates a 210 F4 macro that is amazing. It is not possible to tell, by looking at the pictures, which were taken with or without this TC. Buying this gives you a second lens of equal quality for a little bit of money.
7 of 7 found the following review helpful:
Works Well - Not much of a hit on image qualityJan 31, 2009
By Allan Thornton
I have used this with a Sigma 150-500mm lens. Since the Sigma lens is relatively slow I lose autofocus -- but shots I haven't had this long but shots that I have taken of squirrels and birds in the back yard remain sharp. This is a good purchase for those with compatible Sigma lenses looking for more reach.
6 of 6 found the following review helpful:
Works as designed, great little gadgetOct 06, 2007
By G. M. Wong
I have both a Sigma 50-500 (aka Bigma) and a Sigma 100-300 f/4. Prior to getting the latter, I was able to use the Bigma with my Kenko Pro 300 1.4X TC DG on my Nikon D70. However, the Kenko refuses to work with the 100-300 so I have to buy this Sigma TC which works extremely well with the 100-300. However, unlike the Kenko, I cannot retract the Bigma all the way with the Sigma TC which is why I only give the Sigma TC 4 stars.
The 100-300 f/4 focuses as fast with or without the TC and I don't seem to lose image quality with the Sigma TC either. The EXIF info also correctly shows 420 mm was used. [...].
See all 42 customer reviews on Amazon.com
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