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Canon EF 2X II Extender Telephoto Accessory | 
| Brand: Canon
List Price: $470.00
Buy New: $279.95
You Save: $190.05 (40%)
New (14) from $279.95
Rating:  32 reviews
Media: Electronics
Shipping Weight (lbs): 0.6
Dimensions (in): 5.3 x 3.8 x 3.5
MPN: 6864A004
Model: 6864A004
UPC: 013803001808
EAN: 0013803001808
ASIN: B00009XVBY
Shipping: Eligible for Super Saver Shipping
Availability: Usually ships in 24 hours
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| Features:
| • | Telephoto extender designed to double Canon EF lens focal length | | • | Ideal for shooting close-ups from a distance at sporting events | | • | Weather-resistant and anti-reflective internal construction | | • | Maintains autofocus with any EOD body with f/2.8 or faster aperture | | • | Measures 2.8 inches in diameter and 2.3 inches long; weighs 9.3 ounces |
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| Editorial Reviews:
Product Description
Outstanding optical performance that visually matches the images quality of the host lens / Provides 2-times Photo Magnification Lens construction - 7 elements / 5 groups Overall length - 56.5mm Max. diameter - 71.1mm Package includes Extender Cap, Lens Dust Cap E, Lens Case LP811
Amazon.com Product Description
Designed to double the focal length of any compatible Canon EF lens, the Canon EF 2x II extender telephoto accessory is ideal for sporting events and nature photography. The lens boasts a new seven-element design, along with the same weather-resistant and anti-reflective internal construction as the companion EF 1.4x II extender. More significantly, the extender supports autofocus with any EOS body provided the lens has an f/2.8 or faster maximum aperture (the EF 2x II reduces effective aperture by two stops). The EF 2x II--which also maintains an EOS camera's Image Stabilization technology--carries a one-year warranty. - Magnification: 2.0x
- Lens construction: 7 elements in 5 groups
- Dimensions: 2.8 inches in diameter and 2.3 inches long
- Weight: 9.3 ounces
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| Customer Reviews: Read 27 more reviews...
Adorama is selling used product as new. December 22, 2004
dpe50 (Kentucky)
169 out of 197 found this review helpful
Just received Canon EF 2X II from Adorama. Paid $279.95 plus $17.95 shipping. Len has been previously used and placed back in the pouch and sold as new. Len cap is marred with several scratches. Looks to have been handled rough. My advice is bypass Adorama as a third party vendor and buy directly from Amazon. Adorama refunds within 14 days less shipping. Thats $17.95 for me to return a used product sold as new. Won't go there again!
 Twice the reach at what price? July 15, 2006
L.T. Beasimer (Dallas, TX)
110 out of 117 found this review helpful
This extender is limited to which lenses it will work with, most of them L lenses. The II model features a new seven-element weather-resistant design, and improved anti-reflection internal construction. Auto-focus is possible with any EOS body if an f/2.8 or faster maximum aperture lens is used. Image Stabilization lenses maintain the IS feature when used with current EOS cameras. Using this extender with any lens will eliminate one or two f stops and decrease sharpness to some degree.
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 out there. I found adding this extender with the 100-400mm caused the sharpness to suffer too much for my tastes outweighing the benefit of having extra reach. The minimum 7.6 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 be able to handle the reduction in sharpness with minimal effect. I didn't own this lens when I used the extender, so I cannot say for sure.
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
 Must have for sports and nature shooters. October 18, 2005
T. Harding (Palm Valley, Florida)
52 out of 55 found this review helpful
If you have the big lenses (400mm f/2.8L IS USM or even the 70-200mm f/2.8L IS USM) this is totally worth the addition. The 2x does NOT kill the autofocus on the f/2.8 and effectively doubles your lens with very little distortion around the edges. Check compatability on Canon's website. You won't be disappointed!
Great addition to my EF 70-200 L f/4 !!! April 8, 2004
44 out of 46 found this review helpful
This high quality extender is a great addition to my Canon EF 70-200 L f/4 !! With a top-notch build quality and a tough, weather resistant design equal to that of their highly respected line of "L" lenses, Canon has produced a great product for its unbeatable zoom lens !! Although the 2X extender renders the A/F function useless on many Canon cameras, I found this to be a Very small drawback overall ( I prefer to manually focus under many of my shooting conditions). This extender is more suited for a low f/number lens due to the 2-stop change in brightness, but it is still VERY effective with my f/4 in normal lighting. A lightweight and fairly inexpensive way to double your focal length, while maintaining the incredible optical quality of the main lens...My backpack will always contain my 2X and 1.4X extenders !!
Only acceptable on big glass July 9, 2006
B. Wathen (Olathe, KS USA)
27 out of 28 found this review helpful
This is a good accessory with a 300mm f/2.8 or above. The problem comes when you try to use it with the Canon L zoom lens like the 70-200L or the 100-400L. You lose so much sharpness that it not acceptable for a pro or advanced am, which would be the people buying this accessory. If you have big glass then you should get this, otherwise stay with the Canon EF 1.4X II Extender and get publishable photos.
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