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| Canon EF 1.4X II Extender Telephoto Accessory | 
 enlarge | Brand: Canon
Category: Photography
Buy New: Too low to display
New (12)
Avg. Customer Rating:  32 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:
 Double the fun! May 14, 2007
4 out of 12 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 9 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
48 out of 50 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.
Very useful March 27, 2007
8 out of 16 found this review helpful
Be careful since the 1.4 extender will take one stop of your lighting, making your f/2.8 lens an f/4. Note this means the f/4 lens will become f/5.6 and I think this means that auto-focus doesn't work anymore.
Beyond that, for the L lens series, this is a great piece of equipment to get more focal length. The 2x extender loses 2 stops and apparently gives very apparent sharpness loss, so the 1.4x is the one to get.
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