so this lens does or does not have the internal auto focus motor? and if it does is there a way to turn it off?
770063
Yes this lens is full auto focus, but there is no way to switch from auto to manual focus.
1914225
No because this lens does not have an internal focusing motor this lens needs a camera body with a built in focusing systemYou could use it as a manual focusing lens though
1389271
This lens does not have either of those features, it can only be focused manually and since there is no IS we recommend using this lens with a tripod/wireless remote to avoid blur.
846036
This lens does not have an autofocus motor so regardless of the camera you have it will not autofocus
883765
Is the camera constantly trying to focus? The only motor I can think of is the one that moves the lens. Try it standing in a stationary position filming or photographing something that is not moving - like a tree trunk. If you don't hear any sound because the lens doesn't have to move to refocus, then I would guess it is the lens motor. I didn't like this camera personally and ended up returning it.
443839
This lens is totally manual. You have to set the aperture and shutter speed manually. In fact, you have to turn off the auto focus and any other auto/electronic feature off in your camera
239161
You can shut the auto focus off in the camera settings and then use the outer ring on the lense to focus yourself. The higher up lenses you can buy separate have a selector on the lense that you can cut auto focus on and off with as well.
980020
No, not in auto-mode. But you can fine tune the focus when you switch to manual focus on the lens, and you leave the camera set for auto focus.This is different than other Pentax lenses that don't have the switch on the lens, this may be due to the fact that this lens was built by Tamron. I don't find this to be a big deal though, and enjoy the lens a lot!
977870
This lens does not allow for manual focus. Therefore, the filters stay on the body of the lens, and do not rotate. All the focusing takes place inside the lens. It is strictly auto focus.
1447842
You can manually adjust the aperture or allow the camera to set the f stop. As far as auto focus the lens does have a motor
809207
It does use the camera body motor to focus. It is not the quietest but it's very accurate and quick. One of my favorite lenses!
1642448
This lens doesn't have internal focus motor, nor your camera body, so you wont get autofocus with this lens version. You need the version DX II http://www.amazon.com/dp/B007ORX8ME/ref=cm_sw_su_dp
1819150
It have a autofocus motor BUT you can only AF mode with the nikon D7000 or advance. Why? Because the lens dont have a switch to can change from manual to auto focus, so the cameras that have the switch so you can change ir from the camera are the nikon d7000 and the newers like D7100 and all the full frames
1799490
This lens is only manual focus. No Auto anything - think of it as a lens on the end of a slinky.
1506923
It does have auto focus. Full time manual focus means that you have the ability to manually focus even when the lens is set to "AF". You can also override the AF with manual focusing even with the AF activated.
1926437
It is but it won't have auto focus. And u will have to set Aperture manually. But otherwise it's a great lense with fantastic shallow depth of field!
749839
You've probably figured this out by now, but in case anyone is browsing this forum later on and still wants the answer, I thought I'd post. I use old manual focus Nikon lenses on this camera all the time. There is no auto focus, but they work perfectly fine in manual mode. I have a 10 dollar wireless remote I bought off of Amazon that works great for long shutter exposures.