I have to shoot with it later today. I borrowed a Sigma 70-200/2.8 EX DG HSM and can't for the life of me figure out how to change the focus mode from MF to AF. I don't see a switch, or clutch type thing or any way to change it. Is there just one mode?
>So then they are not like Nikkor AF-S and AF-I lenses that >have an MA/M switch
That's right. They don't have an M/A - M switch like the better AF-S Nikkors, but like Brian says, they operate like those lenses would when set to "M/A", i.e. you can manually touch-up focus at any time. If you need pure manual focusing, you have to switch the camera body to M.
Thanks, Brian...and Brian . I shot yesterday with it. Funny thing happened though...my first battery died after about 15 shots. I loaded my second and only other one, and decided not to mess around...I set the lens to manual focus and used it that way for 2 hours of college volleyball. No big deal, since I had the camera set to only focus with the AF-on button. So much for borrowing the AF lens from the newspaper.
Yep works like a charm, of course there are issues with bodies like the D50 which require the little green focus lock indicator or AF-Lock button pressed before it releases the shutter for some reason.
I'm not sure about the D50, but on other bodies you can set the camera to "shooting rate preference" (as opposed to focus lock preference) so that it will shoot even if the camera isn't sure if the subject is in focus.
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!
I forgot to mention that not only did my first battery go dead in no time when I tried to use AF, but at another point in time, my camera locked up totally and wouldn't shoot. I tried turning it on and off, switching lenses, going into the card preferences (where all the options like delete were mysteriously unaccessable or hidden). Finally after about five minutes, it worked again. Overall, not a good experience. I am not sure if the lens caused it or not though, because I had not used the camera in some time. I will have to see if this happens again. The lens is used every day by someone, so it's possible there is a problem with it.