Sigma 18-200 OS Focus Issues? Does anyone have any focus issues?
606483
I have these lens and I cannot use the autofocus, only manual. It won't focus no matter at what range. So disappointed..
1786217
Thanks for the information. I'm definately looking to unload the 28-80. I hadn't thought about third party lenses. I was always told to stick with Nikon. I'll check out the Sigma.
845656
I wonder if you are using the camera correctly. If you set the camera to continuously focus, and then try to do focus-and-recompose, you will get out-of-focus photos most of the time. The Tamron all-in-one lens, like any all-in-one lens, is not the best lens in the world. But it isn't horribly bad, either. And it normally will not do a lot of focus hunting in decent light. If you are new to SLRs, you might begin by making sure that you aren't the problem. FWIW
386985
I get that same problem (I also have a D7000). However, on mine that is only for close-up macro-type images (when I snap the photo, the focus seems to be farther than where I focused - I lost out on some neat bug photos because of it, and did a lot of testing compared to other lenses). It does OK at distance. My adjustment is less than that (I don't remember it), but I don't use it much for close-ups. I use it mostly for wide shots and landscape work, and also inside museums. In a perfect world, I would buy the 24-70mm f/2.8 Nikon, but this is a third of the price, and for my application is fine. However, if you are shooting people at closer ranges, I can see where it might be an issue. That far off, and it might be worth talking to Sigma about it. They might be able to either fix it or replace it.
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
1758796
FWIW, mine is usable only for general composition purposes. Forget about focusing, or even really seeing what you're shooting with it. I actually put mine away the day it arrived from amazon and didn't touch it again for probably a year, and figured I should have simply returned it. But since then I've come to terms with what it can and can't do, and put it on in the sunshine when I can't see the screen, and use it just for positioning large objects in the composition.
1642451
I assume you've tried auto focus at different legnths. If unsuccessful you definitely need to return the lens. Sorry to hear about your troubles.
831366
Yes and no. There have been a few alarming SDM/Autofocus no-work moments, but a remount of lens and camera on/off has always fixed them immediately. We both use this lens all the time, so counting the one I smashed, we have direct experience with 3 of them.
1752184
I use the sigma 18-35 with a generic focal reducer I will be getting the metabone speed booster soon
512484
This is not an official statement but I've been shooting a lot. And I 99% use single point AF, manually setting focus point according to my subject. I never noticed a left focus or lock up problem.
604837
Hi Jack - to be honest I've not had hands on with this lens. It was bought for my Son for his birthday. And from what I do know about it it is smaller and with the Macro capability - a more useful lens, also the 18-200 has less focal range then the newer Macro Lens. Seems to have pretty good reviews and as my son uses it for digital video - he's pretty happy thus far. Sorry I can't be of more help.Chuck
1548023
Check out photography-on-the-net forum - some discussion there. I have used the 10x zoom to check focus, but with the incredible depth of field for this lens, it is seldom an issue.
101125
Thank you for your response. I seem to do OK with close up but longer focal lengths give me a hard time. I may send it in just for them to check it out. I like the camera but I havent ever been so stymied before.
1804639
I've never noticed it, but I shot mostly portraits.Here's a photo I took with a7, laea4 and sigma 105 hsm macro. http://500px.com/photo/63465851 .No complaints from me.
738145
We haven't had any issues with focus. It did take a bit of practice to get used to focusing and re-positioning items. It's very easy to get scratches in higher level objective lens if they bump an item or if anything smears on the lens.
1898464
I use a 70-300 Sigma. It will work but on manual you can zoom all the way and focus yourself. If your on auto focus it will work only till about 200 mm then it won't focus anymore. But this is what happens with this lens. Can say for sure if it will on any other. As for picture quality I did notice a fair difference. Not very clear when zoomed all the way. But need to try with a tripod. I got it for my birding and does not work well for that for me.
1966950
I haven't tried the 28mm, but I can see it costs about $100 more than the Sigma. I just bought the Siggy and I love it. I have not had any focus issues and it is quite sharp wide open for my purposes (low-light indoor shots of food and people).