Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.
Already have an account? Login
The sigma 105 either has both HSM and OS or it has neither. I don't think you have the OS version, so I'm pretty sure yours is a screwdriver AF model. Do the kenko tubes even have screwdriver coupling?
_____Brian... a bicoastal Nikonian and Team MemberMy gallery is online. Comments and critique welcomed any time!