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Tamron SP Autofocus 2x Pro Teleconverter Lens for Nikon DSLR Cameras | 
| Brand: Tamron
Category: Photography
List Price: $336.95
Buy New: $216.50
You Save: $120.45 (36%)
Rating:  2 reviews
Color: White
Media: Electronics
Autographed: No
Memorabilia: No
Shipping Weight (lbs): 0.6
Dimensions (in): 3.6 x 3.2 x 3.1
MPN: AF20PN-700
Model: AF20PN-700
UPC: 725211207139
EAN: 0725211207139
ASIN: B0000ZJDYY
Shipping: Eligible for Super Saver Shipping
Availability: Usually ships in 2 to 4 weeks
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| Features:
| • | Increases focal length from same camera position by 2x | | • | Superior performance for unsurpassed image quality and ease of use | | • | Fits easily between lens and camera body | | • | Includes carry case | | • | For use with Nikon Digital SLR cameras |
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| Editorial Reviews:
Product Description
The SP AF PRO-series teleconverters, with a newly designed optical construction (4-group/5-element for 1.4X and 4-group/7-element for 2X), are designed to be used with lenses that are F/2.8 and of focal lengths of 90mm or greater. This would make the use of the SP teleconverters ideal for the Tamron SP90mm F/2.8 macro, 70-210mm F/2.8 and 300mm F/2.8. Relative illumination is significantly improved resulting in better overall contrast and resolution across the entire image field. In addition, chromatic aberration and astigmatism are better compensated for by virtue of the use of higher-grade glass materials and more sophisticated design techniques than used in universal-type teleconverters. When used with lenses with smaller maximum apertures (F/4 and F/5.6, for example), there will be little difference in image quality as compared with the standard Tamron teleconverters. When used with lenses wider than 90mm, the SP teleconverters can actually comprise image quality.The 2X doubles the focal length of the master lens and makes the lens two f-stops slower. In addition to increasing focal length, this teleconverter allows greater magnification in macro since the Minimum Object Distance (MOD) of the master lens does not change when used with the teleconverters. AF will be retained with the 2X teleconverter if the master lens is F/4.0 or faster.
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| Customer Reviews:
 Photos May 25, 2007
J. Rosenvold
7 out of 7 found this review helpful
So far, the only negative thing I have to say about the Teleconverter is that when I zoom out to 300mm, I cannot use autofocus. This probably won't be for your rapid shots. I enjoy seeing a larger or closer version of my shot without having to buy a much larger lens for my Nikon.
 Better Than expected May 14, 2007
Sergio (USA)
6 out of 6 found this review helpful
I'm using this 2X teleconverter with a Nikon D-50 and a Tammron 100-400mm
lens. Its been fantastic. I'm hanholding the Camera mainly for Birding Phoptography and could not be more pleased.
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