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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:
 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.
 Depends on the Lens and your Intentions December 23, 2006
15 out of 20 found this review helpful
With the 70-200mm f/2.8 L IS USM lens, this extender is a fantastic accessory. The AF continues to work and the image quality, although down just a notch from images without the extender, is acceptably sharp.
 A little extra reach at a price July 15, 2006
49 out of 60 found this review helpful
This extender is limited to which lenses it will work with, most of them L lenses. Using this extender with any lens will eliminate one f stop and decrease sharpness. Auto-focus is possible on any EOS camera when used with an f/4 or faster maximum aperture lens. The version II extender adds enhanced weather-resistant construction, and improved anti-reflective surfaces in the barrel.
I rented this extender to use with the Canon EF 100-400mm f4.5-5.6L IS USM telephoto zoom lens. This lens while sharp and high in quality, is not the sharpest L lens I have used. I found adding this extender with the 100-400mm caused the sharpness to degrade too much for my tastes; outweighing the benefit of having the extra reach. This is a matter of personal preference; others may be satisfied with the 100-400mm extender combination. The minimum 6.7 f-stop limits creative abilities with this combination too.
I would imagine that using with an extremely sharp lens like the Canon EF 70-200mm f/2.8L IS USM telephoto zoom lens would better handle the reduction in sharpness with minimal effect. I didn't own this lens when I rented the extender, so I cannot say for sure. Also be aware, the extenders will not work with every Canon lens.
I would suggest renting or taking your camera and lens to the store and trying this extender out before buying. I can see where certain combinations may benefit the photographer. In my case, it didn't work out for me.
PROS:
Provides extra reach
CONS:
Eliminates one or two f-stops
Decreases sharpness of the lens
Just a Little Extra Reach April 29, 2006
23 out of 24 found this review helpful
Make sure to check the compatibility charts to verify that your lenses will work with this before buying it since only a handful of L series lenses are compatible. If you do already have one or more of these lenses though this is a nice addition. The AF only works with lenses f/4 and faster on most camera bodies. You do also give up a little image quality by putting this between your lens and camera body, but the extra reach is really nice.
Nice accessory to get closer April 18, 2006
61 out of 65 found this review helpful
I have used the 1.4x II extender for over a year. It gives me amazing detail with my 70-200L f/4 lens on a 20D. I use it mostly for wildlife and butterflies. Contrast is good with colors that pop. When shooting on a sunny day the shutter speeds are still quick with the f/5.6 and the background is blurred beautifully. In shade areas and low light a tripod is a must! There hasn't been any sacrifice in subject detail. I can see individual hairs on butterfly bodies even when shooting wide open. This is a great way to get closer without paying a significant amount for a supertelephoto lens.
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