I see that this lens has Manual focus capability. Does anyone know how the manual focus operates? Slip-ring or switch?
17380
It has that standard AF/MF switch on the side. Set to MF and you adjust the focus with the ring. It's like the other lenses I've used from Canon and others. I'm not sure what slip-ring would be, unless you mean it focuses and then you change it. I haven't tried that.
520677
It is manual focus. You can beat the price. The quality is good and it is a super-big zoom lens.
1235784
Hi, the manual focus ring is mechanical, however, in has what we cann an internal focusing - only the middle groups of the optical system move to achieve focus so the overall length of the lens does not change. -Ely
1764810
Yes. NOTE: unlike most lenses I've used/seen it has no auto/manual focus switch on the lens-so if you want to use it in manual you have to use the switch on the body.
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
1518949
Yes, this lens does have the option for auto focusing. But I clearly find that manual focusing is the better of the two choices. Unlike some lens, this option to change from manual to auto focusing is done by sliding the forward most ring, the one closest to the len's end back and forth. No switch. There is no automatic zoom option. You have to rotate the ring closest to the camera body to zoom in and out. I guess that is why I prefer the manual focusing. But either way, I am very happy with the photos I have taken with this lens. Hope this helps
985640
Sorry, no. There is no mechanism for auto focus on this lens (difficult for this type of usage anyhow).
239160
Yes, you can focus manually. Manual focus is on the lens. Just circulate the lens, and you will manual focus the camera.
645889
On my camera, I have to set the focal length and enable the exposure ring function when using this lens. Once complete, everything is automated but the focus.
247253
This is a very good auto focus lens. However you can turn auto focus off with a switch. When in auto focus mode, you can also refocus the lens to another subject by simply rotating the focus ring without the need to turn off auto focus with the switch.
1345846
I bought this camera so that I could use my old Takamur lenses. So in my application, I use only manual focus. and manual aperature settings. I cannot speak to its automatic capabilities. For my applications, however it is excellent. I did need to purchase an inner adapter ring so that I could use my old lenses.
888898
As stated by the other respondents, yes it has autofocus which can be switched off to manually focus. I've had no issues with the autofocus on my Canon 40d. I also own a sigma 1.4 teleconverter. With the teleconverter on the autofocus doesn't work and you have to focus manually. I've found that 500 is usually plenty of range so honestly I've only had the teleconverter on it once and then only to play around. I was also highly impressed with the OS (Optical Stabilization) on this lens. It is very heavy, but with the OS it is actually not nearly as hard to hand hold as I thought it would be. (But I always use a tripod if I can... no kidding it's very heavy!) Hope this helps! -ed
1521075
I just got this lens and cannot figure out how to adjust the aperture... I can only take photos in f/22 otherwise it tells me to "lock lens aperture ring at minimum aperture" even if I put it in M (manual) mode. How do I change it so the aperture is adjustable and not fixed?
1372848
I have and it's great. Focus ring is incredibly smooth. Very well built lens!
968477
It's an autofocus lens. There is an outer ring that pushed in one direction will be manual focus only. Either pull the ring closer or push farther away and you should get autofocus.
2012320
Yes. Zoom and Focus are manual with the inner ring for the later. It s a little bit to freaky not so gradual control. Its endless so no physical connection with lens I guess.
2187563
Yes, it does have a manual aperture ring. It does not have image stabilization. I believe Ken Rockwell has a chart of camera compatibility. I'm using it on an FM2n. Overall, it's a pretty decent lens if you are only going to use just one.