Sigma EX - Converter APO DG - Canon EF Review

Average Reviews:

(More customer reviews)I ordered the converter to be used with my Sigma 150-500 mm zoom.
I was completely dissapointed because the lens has to be phocused manually when you use the tele converter.
However, I tried the tele converter on a Nikon 70-300 mm zoom and it works great.
I would recommend it for this use to anyone.

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The dedicated 1.4x APO Teleconverter features a high performance 5 element/3 group optical design, and it is optimized for use with long telephoto and telezoom lenses.The high performance optical characteristics of these teleconverters maintain the optical performance of the compatible lenses with which they ca n 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 1.4X Convertor will fit the following lenses 180mm f/3.5 APO MACRO EX HSM - MF300mm f/2.8 APO EX HSM - AF300mm f/4.0 APO MACRO - MF400mm f/5.6 APO MACRO /HSM - MF500mm f/4.5 APO EX HSM - MF800mm f/ 5.6 EX HSM - MF70-200mm f/2.8 EX HSM - AF70-210mm f/2.8 - MF50-500mm f/4-6.3 APO - MF100-300mm f/4 EX HSM - AF120-300mm f/2.8 EX APO - AF300-800mm f/5.6 EX APO - MFWill also fit the following Orginal Nikon AF Lenses300mm f2.8 AF-S - AF300mm 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 manualPlease refer to the manufacturers Teleconverer Matching List for an updated compatability chart.http://www.sigma-photo.co.jp/english/acc/condaitr.htm

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