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 enlarge | Brand: Canon
Category: Photography
List Price: $470.00
Buy New: $263.98
You Save: $206.02 (44%)
New (17) Used (1)
Avg. Customer Rating:  33 reviews
Media: Electronics
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 0.8
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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| Customer Reviews:
 Worth every cent! June 14, 2007
11 out of 11 found this review helpful
On an EF 500mm f4L IS lens, this has to be the ultimate bird photographer's choice. Incredibly sharp combination even wide open. Using any EOS camera with a 1.6x factor, you're looking at an (apparent) EFL of 1120mm at f5.6 ! Who needs the 2x converter! It eats its larger brother for breakfast image-wise anyway, is extremely light, and is an optically perfect relation to any L series Telephoto.
Although it is also advertised as being compatible with the long zooms, don't expect quite the same results as you'll get from a prime lens. The images, though still first-rate, do lack a little of the impact by comparison. That aside, I couldn't recommend it highly enough!
Double the fun! May 14, 2007
5 out of 13 found this review helpful
If you have a compatible zoom, and you need to spend some serious dough to get one, DOUBLE CHECK, then this is a great item to jack up your distance without the loss of quality.
 BETTER THAN MY 2X April 24, 2007
8 out of 8 found this review helpful
I have both the 2x and 1.4x. I just received the 1.4x today and tried it out on a cloudy day. It is not as sharp as I would like but may be better on a bright day. I would suspect it needs quite a bit of light on my 300MM f/4 lens that goes to 5.6 with the extender. My 2x has to be tripod mounted on a sunny day to get good results. At least the auto focus does work with this extender. Overall I think it will work good enough for what I intend to use it for.I am very satisfied with the 300MM prime and as I said my first photos have all been taken on a very cloudy day and I do think my results will be better on clear days.
Will update after I have tested it some more.
The 1.4x is far superior to the 2.0x April 12, 2007
55 out of 57 found this review helpful
I have both the 1.4x and 2x teleconverters from Canon. Neither, despite what people say, produces an image that just as sharp as the original lens. But images through the 2x are noticably bad from even a casual inspection while images through the 1.4x hold up very well. Carefully controlled test shots are the easiest way to really see the problems in this converter. But for the most part the 1.4x won't be a liability in sharpness.
The 1.4x loses one stop of light. So while this does work on a 100mm-400mm f/4.5-5.6 IS L lens, I wouldn't reccommend it. Save this for the 200mm f/2.8 L, and the 300mm f/2.8 IS L, and any bigger primes you have.
Canon EF 1.4X II Extender (Teleconverter) April 11, 2007
19 out of 20 found this review helpful
I'm using my new Canon EF 1.4X II teleconverter with my Canon EF 100-400mm f/4.5-5.6 L IS USM Lens - and so far, so good. (I've only had it for a few weeks). The 100-400mm will not auto-focus with the 1.4x attached to it. Yes, there are ways to tape 3 pins on the lens or teleconverter to override the unit so that it will try to auto-focus, but I've decided NOT to do that. Canon blocked that for a purpose. I've read that you can over-tax (burn out, though I don't know if that's the actual issue) the USM motor since it will hunt back and forth a lot in low light situations if you tape the pins.. so again, I just decided the 100-400mm was too expensive to try that option. Overall, the quality of the lens combination is still really clear (I'm using it with a Canon 30D). I am getting used to manually focusing this combination, but it really helps to use a monopod or a tripod when shotting with this set at full zoom.
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