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Sigma APO Teleconverter 2x EX DG for Nikon Digital SLR Cameras | 
 enlarge | Brand: Sigma
Category: Photography
Buy New: $239.00
New (3) from $239.00
Rating:  4 reviews
Media: Electronics
Fragile: No
Batteries Included: No
Shipping Weight (lbs): 1.1
Dimensions (in): 3.9 x 3.8 x 3.7
MPN: B000CDA7Y4
Model: B000CDA7Y4
UPC: 085126876555
EAN: 0085126876555
ASIN: B000CDA7Y4
Shipping: Eligible for Super Saver Shipping
Availability: Usually ships in 24 hours
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| Features:
| • | Teleconverter lens for Nikon SLR cameras | | • | Increases the focal length by the power of 2 | | • | Multi-layer lens coating and lens design reduces flare and ghosting | | • | Includes lens case |
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| Editorial Reviews:
Product Description
The multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum color balance through the entire zoom range.
Amazon.com Product Description
The Sigma APO Teleconverter 2x EX DG for Nikon Digital SLR Cameras is a dedicated APO teleconverter that can be mounted between select lenses and the camera body to increase the focal length by the power of 2. The multi-layer coating reduces flare and ghosting, which is a common problem with digital cameras. The lens also offers maximum magnification without any variation in the minimum focusing distance. Compact and lightweight, this teleconverter can convert your lenses into longer focal-length lenses, so you don't have to do a lot of unnecessary footwork. A case for the lens is included.
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| Customer Reviews:
 Very pleased May 2, 2008
Ronnie Phipps (Tn. USA)
5 out of 5 found this review helpful
I got this 2x converter to match the Sigma 70/200 2.8 lens. I have shot around 100 pics with this set up and have been very pleased with the results. I have shot wildlife to school track meets.
The only reason I couldn't give this converter a perfect mark is I can't use it with my other Nikon lens.
 Sigma 2X EX DG APO Teleconverter for Nikon AF Cameras February 16, 2007
T. Spencer (Atlanta, GA)
33 out of 33 found this review helpful
After reading the two reviews above, I was somewhat baffled. If you do any research on this product, you will find it clearly is made only for use with Sigma lenses, not Nikon lenses. The instruction manual that comes with the converter even lists which specific Sigma lenses to use. If you want a converter for Nikon lenses, buy the Nikon TC-20E (retails for more than twice the Sigma). Of course the quality of this product is poor when using a Nikon lens! I have a Sigma 70-200 zoom and it works beautifully; it is well worth the price.
 Loss of Quality / Lack of Focus February 10, 2007
William S. D. Read
4 out of 24 found this review helpful
I bought this converter to use with my Nikon ED AF Nikkor 80-200mm 1:2.8 D lens on my Nikon D80. It fits the lens, and seems to work, at least for metering and manual focus, but the resulting images aren't usable-- or at least aren't any more usable than without the converter. My test shoots have been with a sturdy tripod in broad daylight, around f8 and 1/640th (so, plenty of light). I varied the aperture from 11 down to 3.2 (changing the speed accordingly). In taking pictures of a still subject, where I have achieved excellent focus through the viewfinder, the resulting images are very noticeably out of focus.
I played with focusing closer or farther, compared with dead on, and none of these produced an image that was clearly enough in focus to be worthwhile. If I compare the images taken without the teleconverter at 200mm with images taken with the converter (400mm), the result is a similar amount of clarity. In other words, if I crop and the 200mm photos and compare them to ones taken with the teleconverter, I've got just about the same clarity. So, the upshot is, don't get this teleconverter if you are looking to get closer and retain clarity in your images.
only works with very select lens' September 6, 2006
Benjamin Lambert
8 out of 31 found this review helpful
i bought this item to extend my shooting range on my nikon d100 - the longest lens i have is a 300mm. the 2X converter didn't fit my nikkor 300mm, my tamron 28-80mm or my nikon 105.
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