Canon issues an incompatibility warning relating to Sigma Art lenses

Sigma 18 35mm back side angle
If you’ve noticed your new Sigma lenses aren’t playing in a friendly way with your Canon 5D Mark IV, you aren’t alone. Canon has officially released an incompatibility warning informing users that a handful of features on select Sigma lenses are not operating as they are intended to.

Specifically, Sigma says the Manual Override (MO) function on its lenses is unavailable on the Canon 5D Mark IV for the time being. Full-time manual mode, however, is fine and working perfectly, as you would expect.

In addition to the focusing issues, Sigma says almost all in-camera lens corrections settings that Canon offers on its 5D Mark IV (and other DSLRs) should be disabled, as they are not properly supported and can yield incorrect results, if any at all. These settings include Peripheral Illumination correction, Chromatic Aberration correction, Diffraction correction and Distortion correction.

This isn’t the first time Canon cameras and Sigma lenses haven’t played well together. After the release of the Canon 1DX Mark II, a handful of users noticed issues with Sigma’s Art series lenses, where strange rings would appear on the image as a result of a messed up lens correction mode.

There’s no word yet on when these issues will be addressed, either by Sigma or Canon. But if the last Canon/Sigma incident is anything to go by, there should be a firmware update to fix the issue very soon.

In the meantime, your best bet is to make the most of the lenses and camera if you have any combination that may be affected by these issues. If you come across the problem, adjust your settings accordingly and hope the issue is resolved quickly.

Emerging Tech

Awesome Tech You Can’t Buy Yet: A.I.-powered cat toys, wallets, food containers

Check out our roundup of the best new crowdfunding projects and product announcements that hit the web this week. You may not be able to buy this stuff yet, but it sure is fun to gawk!
Product Review

With both style and substance, the ‘budget’ iPhone XR is the iPhone to buy

Apple’s iPhone XS and XS Max are flagship smartphones that do everything and anything. The iPhone XR is more interesting, because while it looks as futuristic as its siblings, it’s also less expensive and more stylish.
Product Review

It's got game. But the Razer Phone 2 is still crippled by its camera

The Razer Phone 2 will impress with its gaming prowess and 120Hz screen. But if you care at all about taking pictures on your phone, skip it. While Razer has improved the camera, it’s still short of the competition.
Gaming

Have problems with your Xbox One? We have the solutions

The Xbox One has evolved over the years, but so have its problems. Thankfully, we have solutions for some of the console's most enduring problems, whether you're experiencing issues with connectivity or your discs.
Gaming

These are the best Xbox One games out right now

More than four years into its lifespan, Microsoft's latest console is finally coming into its own. From 'Cuphead' to 'Halo 5,' the best Xbox One games offer something for everyone.
Wearables

NYPD pulls thousands of body cams after one explodes

The NYPD has recalled thousands of body cameras after one of them exploded during an officer's shift on Sunday, October 21. No one was injured in the incident, which is thought to have been caused by the device's battery.
Photography

Which landmarks are searched for most by creatives? This list has some surprises

What video and images of popular landmarks are creatives looking for most? A recent study by StoryBlocks analyzed search trends to dig up the most requested landmarks on the stock platform. While some are expected, others are surprising.
Cars

Protect yourself (and maybe capture something crazy) with our favorite dash cams

Dashboard cameras can assist drivers in car accident claims, settle speeding ticket disputes, and even catch glimpses of incoming meteors, among other things. Here, we've compiled a list of the most noteworthy offerings available.
Photography

Free your digital memories, and frame them, with the best photo printers

Printed photos are experiencing a revival at the moment, but you don’t need to go to a special lab. Here’s our favorite options for making quality prints, from pocket-sized printers to wide-format photo printers capable of spitting out…
Photography

8 weird, useful camera accessories for your iPhone or Android

With the rise of smartphone cameras comes an explosion of accessories aimed at enhancing your photography skills. Here, we take a look at a few, from add-on grips to entire camera units designed specifically to work with iOS devices.
Deals

The best budget-friendly GoPro alternatives that won’t leave you broke

Cold weather is here, and a good action camera is the perfect way to record all your adventures. You don't need to shell out the big bucks for a GoPro: Check out these great GoPro alternatives, including some 4K cameras, that won’t leave…
Photography

Here's how to make a watermark on any computer or smartphone

People copy images from the web every day. If you want to protect your photography from the prying hands of content thieves, consider adding a watermark. Here's how to make a watermark to keep your work from being shared without due credit.
Social Media

Save me: How to download Instagram photos from any device

Browsing photos in Instagram is one thing, but saving them is another. Until recently, it wasn't easy to get your photos off the 'gram and saved elsewhere. But Instagram has recently launched a tool that lets you download all of your…
Photography

Intel’s augmented reality brings Red Bull Rampage into your living room

The extreme mountain biking action of Red Bull Rampage is coming to your living room thanks to the power of augmented reality and 360-degree video that lets fans load a scale replica of the course right in their phones.