Although some reviewers mention focus issues, I haven't seen any mention of the auto focus failing after time, like the Canon 1.4. Is this true?
49855
Have had my Sigma 50 for a year (w/a Nikon mount) and to date it has not failed yet. There are times when I prefer manual, but the AF hasn't failed.
49856
I haven't experiences it or heard anything about complete failure. The issue has always been a high rate of focus failure or chronic front/back focus for some copies on some camera bodies. Personally, it's never happened to me. When you're shooting at a very wide aperture, pushed in pretty close, your depth of field is so shallow there will often be some errors. I just accept that and do a lot of refocus and reshoot to cover myself, but I'd do that with any lens under those conditions.
49857
I've had mine for two years and it hasn't failed. Never heard anyone mention the AF failing. AF back focusing, or front focus, yes. But depending on what Canon body you're using most the time Micoadjustment enables you to tweak the lens to focus properly.
250583
No, it would be great if it had that option though. I haven't had any issues with the auto focus because the camera itself can easily be moved around.
1758799
yes, just set the camera and lens to auto focus. Go to Dpreview.com for a complete review. Good luck and Happy Shooting!
853804
I have had my Df for only a short time (about 30 days) and have only been able to shoot a limited number of photos. I haven't used live view, nor do I know if it is available on the Df. I'm still learning of all the features. Autofocus is very fast... image quality is excellent. I also own a D7000.
705037
The auto focus will not work. You must focus it manually. It is my understanding that the reason is because a Canon lens pulls power from the camera battery to work. So since there is basically a divider between the lens and camera with the adapter in place, it will not work. I understand that a company by the name of Red Rock makes an adapter for this, but it is expensive compared to this and it's also quite large in size. After seeing the large size of it and price, I didn't pursue it.
142357
My Canon SD850 IS worked beautifully for two years, but this summer it started having the same problems with focusing that have been described on this forum. It has become unusable, so now I am sending it to Canon for repair. Based on this forum, I don't have a great deal of confidence that it will be resolved for the long term. The canon customer rep that I spoke with today said there are no service bulletins on Canon's official website regarding this problem, so it is not a design or manufacturing flaw that they are owning up to at this time.
1782975
I pre-ordered. I agree with PencilInWin - the early bug rate in newly released Canon cameras has been very high. The 1DM3 had the focus issues, my 5DM2 had the notorious "error 20" issues necessitating 3 (yes, that's three) trips to the Canon repair facility for shutter assembly replacements. However, I got an early 1DsM3 and I am thrilled with it. I am going to sell my 5dM2 and switch the workflow I used to do with it to the 1DM4. Hope Canon got this one right from the get-go.
447639
I've been using mine for a long time now and never had any focusing issues. One of my favorite lens. I was so pleased with it I also now have the 30mm f1.4
1564625
I used this lens for one year until yesterday without any problems. Just yesterday I am experiencing the same issue: quite focus hunting when zoomed out at 70+ and when it stops it is not on focus! Any idea?
286751
Are you sure? everything I have read so far states it doesn`t auto focus. Thats why I didn`t buy it yet. I can`t see buying one if I have to focus in shots anyways.
1663833
Usually yes. If you're in an auto mode there me be a delay for focus / light metering etc like most dslrs. However none of that in manual.
1974696
Yes I too bought this lens not too long ago (under a year) noticed the sound immediately however I expected that heading it from many sources, what troubles me though is that it's been only 6 months and I've had to send it in for service because my auto focus motor failed.
166892
Thanks for the info on a potential new Canon with autofocus, DigitalHecht. I'll hold off as well to see what comes available. No rush, although I intend to purchase my first SLR in the next few months. The video autofocus is a must for me.
1922340
Yes, I have not had any issues with this lens, in fact, I love it. I use the auto setting on the camera and all pics have been great!
1209305
No auto focus control, even if you're using lenses with AF. (At least for the canon lens mount, though I expect all the mounts are like this). Also, iris/exposure control is limited on some lenses. Check their website to see what works.
1364479
I have not noticed any problems with auto-focus. I've shot video of a baseball game and didn't have any problem seeking proper focus. I've not had any problems where people were the center of interest. The only time I've noticed any auto-focus seeking was on a scenic shot on high zoom with low contrast in the scene. This camera does very well when people are the center of interest.
862457
It works really well. Between my friend and I, we have the Canon 6D and 7D and use it all the time with both. Works perfect with auto focus. This is ALWAYS on my camera!