For further information, please visit www.sigma-imaging-uk.com/returns, call our helpline on 01707 376 795 or email us at support@sigma-imaging-uk.com. In the unlikely event that the inspection uncovers a potential problem, your lens will be modified and returned to you absolutely free of charge with the minimum of delay. Since the day one I have been facing bad focusing issues. We deeply apologise if any inconvenience has been caused to our customers. I decided to compare the Sigma at 300mm vs. my Canon 70-100mm 4.6L, and these are the results: Canon 70-300L @ 300mm over a distance of 10m (F8 1/250, tripod) Sigma 100-600 C @ 300mm over a distance of 10m (F8 1/250, tripod) As you can see, the Sigma is blurry throughout the image, whereas the Canon is pretty sharp. Yalding If there a way to fix this problem, as the AF area is not highlighted, also the focus mode is greyed out?? To see more of his work please visit his studio website blurMEDIAphotography, or follow him on Twitter, 500px, Google Plus or YouTube. The autofocus doesn't want to work, if I take it off and back on again sometimes it comes back to life but it might take several times before it works. I just bought a 5D Mk III a couple of months ago and the lens worked fine with the new body. Tel: 631 227-2036 Toll Free: 800 896-6858 Fax: 631 585-1895 E-mail: info@sigmaphoto.com. Remember, though, if you have multiple cameras, you are making the adjustment in the camera, not the lens, so you need to calibrate each lens on each camera. Now, if you’re a landscape photographer who photographs everything at f/16, you’re probably not going to notice it your lens’ focus is slightly off. JP Phase detect autofocus has always traded speed for focus tolerance. Results are astonishing. And a few notes about setting in camera adjustments: I set the “on camera” adjustments at zero. However, if for example you are a portrait photographer who has invested in a set of prime lenses and you almost always photograph your subjects between f/1.4 and f/2.8 – you definitely want to make sure that your lens’ focus is bang on – because at f/1.4 the difference between your subject’s eye being in focus versus their eyelashes is a big problem. I recently got Sigma 35mm F1.4 Art lens for my Canon Rebel T4i. Sigma autofocus issues. But the issue does not seem to get better. Open the SIGMA software and add a + 1 or a +2. If you would like to send your repair to Sigma Corporation of America please complete the online repair form. Despite what photographers always argue in the blogosphere, BOTH autofocus methods require contrast in order to focus. You can follow his work on 500px, IG, and Flickr, and get his tutorials here. The Sigma USB dock is another world because the lens performs totally different as the distance with the subject change. can change a lens mid-rappel, swap a memory card while treading water, or use a camel as a light stand. How to fix? I would like to know if updating my lens firmware via the usb dock is going to fix this. Autofocus systems also struggle in dim lighting, although that difficulty is often offset on the Nikon D3100, D5100, or D7000 by the AF-assist lamp, which shoots out a beam of light […] This implies that some lenses will not auto-focus on a teleconverter, e.g. The system looks at a split set of data received at the autofocus sensors, measures the difference, then tells the lens to move the direction and distance it calculates. (I also used a tape measure to measure the different distances because you have 4 different distances to set. If you are the owner of one of the above three focal lengths but your serial number is different to those specified above, then you need take no further action. This target was originally created by Toronto fitness photographer David Liang. Sigma statement, as supplied by Sigma UK at 9.00am on 16 June 2010: Auto focusing issue affects limited number of Sigma telezoom lenses. In order to do the adjustments, you need to follow these steps: It looks complicated but actually it is a pretty straight forward process. Canon DSLR bodies prevent poor auto-focus performance by disabling it completely when the lens reports maximum aperture at chosen focal length smaller than f/5.6. Autofocus micro adjustment is a feature in the camera and a process that helps you correct focusing errors like front focusing or back focusing. This type of lens focus calibration is really only practical for prime lenses. You can find out more about John on his website and follow his adventures on YouTube. Here is a great video from B&H that explains the procedure for calibrating your lenses using the Datacolor SpyderLensCal Autofocus Calibration Aid, and you can use the exact same process using your DIY lens focus calibration target. Wait for the reflection to diminish or change positions, so that the reflection is less prominent. If not, it'll cost around £85.00+ to fix (see the Sigma repair tariff at: Sigma Imaging (UK) Ltd). I have a D7000, I have been having the Auto Focus issue with all my lenses (35mm(Nikkor), 17-70mm (Sigma), 70-300mm (Sigma)). Joined: Oct 17, 2010 Messages: 708 Likes Received: 76 Can others edit my Photos: Photos OK to edit. Photographers have been warned of a potential ‘autofocus defect’ affecting some Sigma telezoom lenses. The Granary, Downs Court Maybe you will see autofocus kick in while you do that, proving a connection problem. And here is another tutorial video that takes you through the entire lens focus calibration procedure for a Sigma lens, using a lens calibration target. Sigma’s strategy for designing autofocus lenses has been the good old method of reverse engineering. If you find that the subject in the image taken using autofocus looks softer than the one taken in live-view mode, you would need to tune the AF system. Sigma Corporation of America. Sigma has pledged to rectify the fault, free of charge. Anyone have any experience with Sigma for repairs? Direct Light That Causes Glare. Tomasko No longer a newbie, moving up! Have you calibrated the focus of your lenses? I first did a quick disassembly of the mount, exposing the autofocus motor and the top of the lens components. After using the lens in full manual for a while, I determined that I would attempt to repair it. All the internet research I've done points to issues electronic, but I believe this to be mechanical simply because of the noise it makes. Hours: 9:00AM – 5:00PM, M-F EST. DSLR cameras utilize two methods to focus: one is phase detection and the other is contrast detection. Chuck it in the bin if not covered by Sigma (UK) warranty. www.kelsey.co.uk, TILT Digital Agency WordPress Designers and Developers in Kent, Photographers and terrorism tackled in documentaries, Photographer Terry O’Neill launches 2010 shootout, WordPress Designers and Developers in Kent. Lens is long out of warranty. On the camera it must be set on AF, not M, and on the lens put it to M/A (A stands for Autofocus and M for Manual, M/A allows you to use both). My other lenses work fine on the D2300. Tel: 631 227-2036 Toll Free: 800 896-6858 Fax: 631 585-1895 E-mail: info@sigmaphoto.com. Adam owns a production company that specializes in corporate marketing and brand strategy. Re-attach the lens to the camera, insert back the SD and take a second shot. The Nikon focus adjustments tool is nice but you can set only ONE adjustment per lens. For Canon cameras, it’s very similar. Hello, The autofocus on my Canon 18-55mm is malfunctioning and I'm afraid it may be broken. Receive latest product news and technique tips from Amateur Photographer. Here is a video from Sigma that explains how to use the Sigma USB Dock and Optimization Pro software to calibrate the focus of your Sigma lenses. This is why it is difficult to focus on a large white sheet of paper. That happens because metal gear moves planstic focus ring inside the lens and the focus infinity position is being detected when the camera can't move the ring any further. Recently, the lens stopped auto-focusing. My 35mm f2 canon lens's autofocus has stopped working. In autofocus mode my camera recognizes when an object is out of focus and makes a single click noise, but the focus does not change. Discussion in 'Beyond the Basics' started by Tomasko, Oct 1, 2017. In the case of any autofocus problem becoming apparent on inspection, we will rectify the situation and make every effort to minimise delay and inconvenience. the popular Canon EF 100-400 f/4.5-5.6L, or any f/4 lens on a TC stronger than 1.4×. Instead use the chromatic aberration. His videos have over a hundred million views, have been extensively published by news outlets, and has even received recognition from a few film festivals, such as International Ocean Festival, Tom Saimon is a fashion and editorial photographer based in Haifa, Israel. Dunja Djudjic is a writer and photographer from Novi Sad, Serbia. The affected serial numbers are listed in the firm’s statement below. The problem affects some APO 50-500mm f/4.5-6.3 DG OS HSM, APO 120-400mm f/4.5-5.6 DG OS HSM and APO 150-500mm f/5-6.3 DG OS HSM zooms. Third-party adjustments. I purchased it along with a 5D. Here is a video from Sigma that explains how to use the Sigma USB Dock and Optimization Pro software to calibrate the focus of your Sigma lenses. In today’s article, you’ll learn how to determine which lens has this issue and how to fix autofocus issues. Ole Henrik Skjelstad is a Norwegian math teacher and landscape photographer. If you do, post some pictures :) But that's just what's happened to some Sigma lens owners. Hello everyone, I own a Nikon D3300 and a Sigma 18-35mm f/1.8 DC. #1 Autofocus not Manual. 01959 541444 Sigma 50-500mm OS Autofocus problems. Did quite a lot of shooting but 3 days in my Sigma 50-500mm quit on me, the autofocus just stopped. If zero on the ruler and the target focus plane do not exactly line up, simply use the line on the ruler that does exactly line up – or make a new mark on the ruler with a fine pen. Any one got any suggestions? My 70-200 f/2.8 did the same thing. So, not long ago I bought my first Sigma lens: Sigma 50mm f/1.4 ART. You can see her work on Flickr, Behance and her Facebook page. Check the image at 200% to see if the focus on the ruler of the focus target is on the 0. But as I am now using a set of Sigma ART lenses for the majority of my work, and especially with the new Sigma ART 85mm, I am using f/1.4 more than ever before and with that narrow of a depth of field, I am noticing subtle focus errors more and more often. Focus ring problem is a common known fault of this Sigma lens for Sony. Anyone have any experience with Sigma for repairs? Try holding your AF button on and at the same time, man-handle the lens a little. So does this mean its an issue with the Camera Body.? Its like its in manual miode which is not good. (David also wrote a more detailed explanation on how to assemble the target here.). With modern high megapixel cameras even a slight front or back focus can be the difference between a usable image and a reject. Although it is possible to adjust the autofocusing of third-party lenses in-camera, Sigma … Good luck. All the internet research I've done points to issues electronic, but I believe this to be mechanical simply because of the noise it makes. Remove the lens without touching the tripod and attach the lens to the USB dock. Check that both the lens and the camera switches are both pointing towards Autofocus. Oct 1, 2017 #1. On the camera it must be set on AF, not M, and on the lens put it to M/A (A stands for Autofocus and M for Manual, M/A allows you to use both). JP’s photography is available for licensing at Stocksy United. You can download a PDF lens focus calibration target here. Did quite a lot of shooting but 3 days in my Sigma 50-500mm quit on me, the autofocus just stopped. Sigma has pledged to rectify the fault, free of charge. I pointed a light directly on the focus target (so I didn’t use the MLU function)2. To overcome this issue, we will be offering our customers an inspection and where applicable, a modification service, free of charge. It’s worth pointing out now that this process is really to calibrate the autofocus on your camera to the desired lens and will not fix ‘soft’ focus lenses in any way. Some subjects confuse even the most sophisticated autofocusing systems, causing a camera’s autofocus motor to spend a long time “hunting” for its focus point. Remove the SD card and open the image in Camera Raw, Bridge, LR or wherever you can zoom in (or shoot tethered). By: Mike Flacy. Cleaned contacts, tried it on 3 different bodies and nothing. To measure in the right way, look for the focal plane mark symbol on the camera and start measuring from that point.). 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