The Sigma dedicated 2x APO Teleconverter features a high performance 6 element/5 group optical design, and it is optimized for use with long telephoto and telezoom lenses.
The high performance optical characteristics of this teleconverter maintains the optical performance of the compatible lenses with which it can be used.
Sigma APO Tele Converter 1.4x and 2x are dedicated Tele Converter lenses, which should be used only with the listed lenses.
The 2x Convertor will fit the following lenses
180mm f/3.5 APO MACRO Ex HSM - MF
300mm f/2.8 APO Ex HSM - AF
300mm f/4.0 APO MACRO - MF
400mm f/5.6 APO MACRO /HSM - MF
500mm f/4.5 APO Ex HSM - MF
800mm f/ 5.6 Ex HSM - MF
70-200mm f/2.8 Ex HSM - AF
70-210mm f/2.8 - MF
50-500mm f/4-6.3 APO - MF
100-300mm f/4 Ex HSM - MF
120-300mm f/2.8 Ex APO - AF
300-800mm f/5.6 Ex APO - MF
Will also fit the following Orginal Nikon AF Lenses
300mm f2.8 AF-S - AF
300mm f4.0 ED AF - MF
On the lists, the lenses marked "AF" will retain auto focus operation when used with a Tele Converter. The lenses marked "MF can only be used for manual
Please refer to the manufacturers Teleconverer Matching List for an updated compatability chart.
http://www.sigma-photo.co.jp/english/acc/condaitr.htm
The Sigma 2x APO Tele-Converter is commonly used for Landscape/scenery, Wildlife photos and more.The Sigma 2x APO Tele-Converter is most used by customers who consider themselves to be a Photo enthusiast, Semi-pro photographer among others.The Sigma 2x APO Tele-Converter is popular because customers like the following qualities of the Sigma 2x APO Tele-Converter: Durable, Fast / accurate auto-focus, Lightweight and Strong construction
Sigma 2x EX DG APO Teleconverter for Nikon
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Pouches & Cases
Lens Cleaning & Care
Construction
5 Groups /6 Elements
Dimensions (Length x Diameter)
68 x 45.3mm / 2.6 x 1.78"
Weight
234g / 8.3oz.
• Front & Rear Lens Caps
• Soft Case
• Brand New Factory Fresh Import Model