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Canon EF 1.4X II Extender Telephoto Accessory | 
 enlarge | Brand: Canon
Category: Photography
List Price: $470.00
Buy New: $262.99
You Save: $207.01 (44%)
New (16) Used (3) from $240.00
Rating:  34 reviews
Media: Electronics
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 1
Dimensions (in): 4.4 x 3.8 x 3.7
MPN: 6845A004
Model: 6845A004
UPC: 013803002423
EAN: 0013803002423
ASIN: B00009R6WL
Availability: Usually ships in 1-2 business days
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| Features:
| • | 1.4x telephoto extender for multiplying focal length of Canon 135mm or longer lenses | | • | Fits all 135mm or longer fixed focal length lenses and some 70-200mm telephoto lenses | | • | Preserves autofocus on any EOS camera when combined with f/4 or faster lens | | • | Weather-resistant construction and improved anti-reflective surfaces in the barrel | | • | Measures 2.9 inches in diameter and 1.1 inches long; weighs 7.8 ounces |
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| Editorial Reviews:
Amazon.com Product Description
Multiply the focal length of your 135mm or longer lens by 1.4x without sacrificing image quality with the Canon EF 1.4x II extender. Optically superb, the lens fits all Canon 135mm fixed focal length lenses (except the 135mm f/2.8 Softfocus lens), along with the EF 70-200mm f/2.8L, 70-200mm f/2.8L, 70-200mm f/4.0L, 70-200mm f/4.0L IS USM, and 100-400mm f/4.5-5.6L IS zoom lenses. In addition, the extender doesn't sacrifice your autofocus on any EOS camera as long as it's combined with a lens having an f/4 or faster maximum aperture (the extender reduces the effective aperture by one f-stop). Best of all, this version maintains the outstanding optics of the earlier incarnation, but adds a weather-resistant construction and improved anti-reflective surfaces in the barrel. The EF 1.4x II extender, which measures 2.9 inches in diameter and 1.1 inches long, weighs 7.8 ounces.
Product Description
Attaching this high performance Extender to a 135mm or longer lens, or to the EF 70-200mm f/2.8L boosts the focal length by 1.4 times. With five elements in four lens groups, it preserves the prime lens' image quality.
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| Customer Reviews: Read 29 more reviews...
 Great product at a great price January 8, 2009
I use this with my Canon 70-200mm F2.8 to get me some longer shots that wouldn't be possible without it. All the while keeping a nice F4.0 and autofocus intact.
In my mind this is much more useful than the 2x extender in that you still have a nice soft F4.0 instead of bumping up to F5.6 with the 2x and the 1.4 multiplier is pretty far already. I might buy a 2x someday, but if you have to make a choice I think you'll be happier with the 1.4x.
Better than the 2X November 16, 2008
1 out of 1 found this review helpful
I have the 2x converter but found this to be a bit soft and certainly slow on autofocus with both my 100-400 and 70-200f2.8 lenses. A fellow enthusiast told me to try this converter and I am so glad I took his advice. I used it with my 70-200 at the local airshow and was amazed at some of the shots I got even into the sun [you dont get an option usually at an airshow] The focussing was fast and accurate. Follow the instructions though about attaching this as regards sequence and switch the camera power off whilst adding it otherwise I have found the auto focus doesnt pick up so well if you add it with power on.
Nice build quality! June 5, 2008
0 out of 2 found this review helpful
I just got this, but was happy to see that it is "L" build. That is, metal and matches the color/style of the 70-200mm f/2.8L IS USM.
No tests yet to comapre before/after. Does anyone know pf a good test pattern to download and print that has progressively smaller lines, like a "bull's eye" style pattern for testing lens sharpness? I see a lot of subjective evaluations, but would liek to see some pictures at a fixed length that actually demostrate the differences.
I'll look for something like this and update this review with pictures once I do.
Oh, and my f/2.8L is a f/4L with this thing attached.
Thanks, Canon!
Good Toys to play with June 1, 2008
1 out of 6 found this review helpful
There no words to say then GOOD
It very help with the zoom lens.
 Another Good Canon Product May 12, 2008
2 out of 2 found this review helpful
Got this to go with my 70-200L 2.8 IS lens which this is perfect for my shooting needs. Gives the added extension to the lens on my 5D and still maintains the image stabilizing and AF function. Canon did design this to fit only specific Canon lenses.
I tried it on my Sigma 50-500 and the outerbarrel of the TC will not fit inside of the Sigma.
Otherwise the TC was pretty sharp at least my copy is .
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