How do you figure out which lenses have a "clutch" autofocus action? In otherwords, you can manually adjust focus while in autofocus mode.
887817
I wouldn't adviyce manual focus on autofocus. I pretty much shoot manual focus. As for a clutch, I wouldn't know right off hand.
1507988
Great Lens...set the aperture to highest setting...then start taking fully auto focused sharp pictures. Get a good filter and start shooting. Enjoy!
170018
I think that motor is built in as most of the other lenses. It's rare to see an AF lense without motor. By the way the camera does it all. From autofocus to image stabilize. You're still be able to focus object manually.
2120527
No manual focus. But lots of options for how to set up focusing, spot, multi, etc.
2268722
There is a focus knob for the view finder on the left hand side of the view finder. You turn this knob to adjust for your eye, then leave it. Obiviously, the focus for the lens is automatic. What I do is foucs the lens on a magazine cover, then adjust the view finder knob until the letters on the cover of the magazine are as sharp as possible. ( I don't see so good even from my good eye anymore.....)
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.
565961
I just figured out how to do this today with my new lens. Since Sigma did not put the autofocus/manual focus switch on the lens itself, you need to go into the information menu (the i menu on the lower left side of the camera) and set your focus mode to manual (change the AF-A on the right side to MF). Once you override the autofocus on the camera, use the outer ring on the lens to focus. Hope this helps! Took me a little bit of research to find this. :)
963589
I have 3 lenses and 2 of them are auto focus, but can be used on manual. The 3rd is manual only. From what I've seen and read, there is a lot of variation in them for a variety of reasons.
528348
When I bought my digital camera, I had several lenses that would attach to the camera but not all of them functioned properly. I think manual focus lenses may be confusing since a lot of the camera's capability won't work.
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!
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.
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.
1653571
yes. there is a manual focus option. I played with a couple times but don't love it (but I'm used to a DSLR and manual focus)
1506920
No what full time manual focus means is you can correct the focus as the focus ring stays connected and you can override auto focus at any time after it has locked focus, however as I have never had any pictures not pin sharp from this lens relying on auto-focus I never have to use the manual focus ring, the lens snaps in to focus first touch of the shutter every time, just wish my other lenses were as good as this one at getting it right when you need it, best 300 on the market IMO, much prefer this to the 2.8 version.
2046268
The autofocus function is controlled by the camera, not the lens. Let's say that the lens has the muscle but the camera has the brain. So if you have another lens that does not autofocus in movie mode, don't expect this one to do so.Hoping this answers your question.
1407503
I have used this for a couple months, and its all auto-focus-- zoom, movies, stills. I have not used a manual focus at all.
1321063
AutoFocus was fine. Some circumstances, e.g., bird watching, require manual focus.