paulwinclad
Well-known member
Sigma 500mm f4.5 focus problems with 1.4x ?
I have just bought a Sigma 500mm f4.5 (Nikon fit) have tried sigma 1.4x with taped pin and modified Nikon tc-14e, neither will autofocus properly, just gets close then judders in and out of focus for up to 10 seconds or so then sometimes gets there.
Anyone else bought this lens recently with same problem ? Any Kenko pro 300 users with no problems ?
Have contacted Sigma but no help as 'Not sold as autofocus with teleconverter'
I have just bought a Sigma 500mm f4.5 (Nikon fit) have tried sigma 1.4x with taped pin and modified Nikon tc-14e, neither will autofocus properly, just gets close then judders in and out of focus for up to 10 seconds or so then sometimes gets there.
Anyone else bought this lens recently with same problem ? Any Kenko pro 300 users with no problems ?
Have contacted Sigma but no help as 'Not sold as autofocus with teleconverter'