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Sigma is now offering a free upgrade to Nikon D3 owners using Sigma’s Nikon fitting lenses that don’t support the Auto DX crop" function.
Upgrade will be required for the following problems:
When the Nikon D3 is in Auto DX crop function and the 30mm F1.4 EX DC HSM or 10-20mm F4-5.6 EX DC HSM lens is attached, the image area format will not change to DX format automatically.
When the Nikon D3 is in Auto DX crop function and the APO 300mm F2.8 EX DG HSM or APO 120-300mm F2.8 EX DG HSM lens is attached, the image area format will be changed to DX format, even if the image area format is set to FX format or 5:4.
For further information, please contact you’re nearest authorized Sigma Service Station.