Sigma 18-200 OS Focus Issues? Does anyone have any focus issues? I read in some forume with this lens having focus issues. Initially, I thought it was my hand shaking or slow shutter speed. But even on a tri pod, I am having a hard time getting the pictures to be sharp even shooting daylight. Sigma 18-200 OS Focus Issues? Does anyone have any focus issues? I read in some forume with this lens having focus issues. Initially, I thought it was my hand shaking or slow shutter speed. But... » Read More Sigma 18-200 OS Focus Issues? Does anyone have any focus issues? I read in some forume with this lens having focus issues. Initially, I thought it was my hand shaking or slow shutter speed. But even on a tri pod, I am having a hard time getting the pictures to be sharp even shooting daylight. « Show Less
606482
My shots are mostly very sharp, however, occasionally, this lens will just produce a clunker. However, I'm not sure its any worse than with some of the "L" series lenses that I've used, so I put it down to technology failure. I normally would attribute it to me, but there are times when I take a picture in noon daylight, standing still and its out of focus. That's almost impossible if you think about it.
606483
I have these lens and I cannot use the autofocus, only manual. It won't focus no matter at what range. So disappointed..
606484
I'm so glad there's something posted here - this is one of the lenses I'm considering getting my husband for Christmas. He has the Sigma 50-200mm lens right now and in my experience with it, it hasn't been too bad. Should he be happy with the 18-200?
483238
None that I have noticed. The 18-200 lens for DX cameras had the problem on earlier version.
1966952
Did you make a decision? I am currently debating the same two lenses. I am leaning towards the Canon since it seems there are quite a few quality/AF issues with the Sigma. Any advice is appreciated.
526622
Hi There does not appear to be any lag. Hit the shutter button and you have it. By the way, I am a professional photographer and I owned the original RX100. Did not like it as I felt the lens and/or sensor was simply not sharp enough for my needs. I sold it after 3 months. The Mark 3 is fabulous and Sony has fixed the problems PLUS added an EVF. This camera lens/sensor combo is really sharp and I am delighted with it. It is my "carry around" always camera. Good luck and well wishes! - Phil Johannes
1157231
Thanks, Philip. I kept mine, still really pleased. Learned that shooting in "Auto" is my best friend right now (clear crisp photos at any distance from macro to nearly all zoom), but glad to hear the "shaken when stirred" is not a sign of something wrong, or about to go wrong. Best wishes.
486339
I'd be curious to know as well. The 720SW had a fairly slow shutter, and one had to really concentrate to get a non-blurry photo. Unless, you enabled the stabilization, and then the photo got a little grainy... Anybody have feedback on that?
959173
Shutter lag isn't really a problem, but I would be concerned about the need for low ISO (200 max) unless you're shooting b&w;, in which case, it is simply a lovely camera.
134990
Hello. I purchased tis lens and I can not be happier with it. The image quality comapred to the sigma to em is superior. LEss Chromatic Averration and way less distrotions on the edge of the frame on full frame cameras.Build is oustanding and I do used it for my paid jobs. Lokk at this link so you cna see some of the images of this magnificent and very good quality lens:http://fmta.com.mx/index.php/galerias-de-fotos/galeriasolimpiadas2014/64-olimpiadasclasificatorias2
189243
J. ONeill says: Did you make a decision? I am currently debating the same two lenses. I am leaning towards the Canon since it seems there are quite a few quality/AF issues with the Sigma. Any advice is appreciated. If you own a camera with micro focus adjustment like the 50D or 7D, Sigmas front or back focusing is a non-issue. Also, even if you don't own a camera with micro focus adjustment, if you get a Sigma lens that front or back focuses, you can send it to Sigma for calibration.
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.
585645
I think you are right here. I don't believe it is a lens problem as I have see this problem across a couple of lens. I did two things that seem to make a different, the first was I completely reset all the camera setting and second thing I did was up grade the camera fireware from version 1.0. 4. to version 1.0. 9. This seems to have made a difference.
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
1046019
The link for the comparison at cameralabs.com is not applicable because it tested the Sigma 18-200 DC prior to the release of the OS version. The OS version is much better optically than its predecessor and also includes HSM (High Speed Motor). I have read test reviews and comparisons at other sites such as popphoto that indicate the Sigma is sharper and has less distortion than the Nikon 18-200 VR, but they also state it is slightly louder. I just received my Sigma 18-200 OS today and have done limited testing, but I can tell you the AF and OS noise are not bad (the OS chirps when it turns on and off). The Sigma AF is louder than my Nikon 18-135 (w/SWM), but quieter than the AF on my Nikon 50mm 1.8 prime (wo/SWM). The HSM AF seems just as fast as my Nikon lenses. The build quality feels better than the Nikon 18-135; the zoom is smooth and solid. The first things I tested today were barrel distortion and OS functionality. Barrel distortion is present at the wide end on ALL wide-range zooms, but the Sigma controls it better. The Sigma has noticeably less barrel distortion at 18mm than my Nikon. This benefit of the Sigma is moot really, because barrel distortion of both lenses can easily be corrected with software. The OS functions very well, I can shoot hand-held down to 1/10th of a second with no blur. I will post again after I have time to do more testing.
576101
You might have a lemon. I have the 520 and has no problem with it. Images are sharp and good. I don't have a 200mm+ lens so I haven't tried that. I have tried up to 150mm without any problem.
1089980
i too had problems with blurring and out of focus shots, ive used the camera a lot recently, and was getting annoyed that close up shots were rubbish, until a friend said try turning off the image stabilizer, i did, close up pics look much sharper, i only use the stabilzer now for long zoom shots, isnt that what its suppose to be for anyway, maybe it aint suppose to be on all the time
1868331
Exactly, I have the same experience. Once the lens focusing is a bit stiffer then the follow focus jumps up and down.The only solution is to replace this follow focus with the one without the quick release, as I did and I am quite satisfied now:Fotga upgrade DP500IIS dampen follow focus with A/B hard stop for DSLR CameraFotga upgrade DP500IIS dampen follow focus with A/B hard stop for DSLR Camera
526621
HiThere does not appear to be any lag. Hit the shutter button and you have it. By the way, I am a professional photographer and I owned the original RX100. Did not like it as I felt the lens and/or sensor was simply not sharp enough for my needs. I sold it after 3 months. The Mark 3 is fabulous and Sony has fixed the problems PLUS added an EVF. This camera lens/sensor combo is really sharp and I am delighted with it. It is my "carry around" always camera.Good luck and well wishes!- Phil Johannes