Compare Nikon TC-17E II 1.7x (JAA-912-DA) Lens Converter for AF-S, AF-I to Sigma APO DG EX 1.4 (824955) Lens Converter for Nikon D

Adds photographic versatility without the expense of an extra lens. Allows focal length to be extended by a factor of 1.7 times while retaining a sense of overall comfort in the hand. Minimal effect on f-number of 1.5 stops. Communicates with the signals from most lenses. Supports the use of Nikon Vibration Reduction (VR) function. Design is consistent with the current TC-14E II and TC-20E II teleconverters. Less

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 can be used. The 1.4X 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 - AF 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. Less