Articles tagged "autofocus"

Video: Tamron 28-75mm F2.8 FE face and eye-detect autofocus test

Photographer David Oastler got his hands on an early copy of the Tamron 28-75mm F2.8 Sony FE lens, and while he couldn't take pictures with it, he did get to test its focusing capabilities. The great news: this thing focuses just as fast a Sony native lens.

Samyang unveils AF 14mm F2.8 EF, its first autofocus lens for Canon

Meet Samyang's first autofocus lens for Canon EF-Mount: the AF 14mm F2.8 EF. At just 700 Euro (~$840 USD), this new third-party offering gives Canon shooters a much more affordable option to Canon's own $2,100 14mm F2.8L II IS USM.

Nikon D850 in-depth autofocus test

We've spent some serious time assessing the autofocus system on the D850; from portraits to bicyclists, we've found out just how precise this camera's focus is, and how well its subject tracking will keep up. Check it out for yourself in our updated First Impressions review.

Samyang unveils 35mm F1.4 autofocus lens for Sony full-frame mirrorless

Samyang has announced its fourth autofocus prime lens for Sony full-frame mirrorless cameras: meet the long-rumored and much-anticipated Samyang AF 35mm F1.4 FE.

Not quite as good? Nikon D850 versus Nikon D5 subject tracking

Photographer Matt Granger recently pitted the Nikon D850 up against the flagship D5 in a subject tracking battle royal, proclaiming the D5 comes out on top. Is he right? Here's our take

Sony packed serious phase detect AF into these new 4K palm-style camcorders

Sony just debuted three palm-style 4K camcorders that steal a bit of speedy phase detect autofocus technology from the company's RX10 IV. In fact, they kind of improve on it.

Video: Sony a9 falls short with  Canon 300mm and 400mm lenses attached

If you're thinking of using Canon's sports glass on the Sony a9, think again. The ultra-fast camera slows way down when you attach off-brand glass.

A visual history of Canon autofocus and how it works today

This short animated video produced by Canon looks back on the dawn of autofocus, and also explains how modern systems work.

Looking back: Canon's eye-controlled focus

In this week's Throwback Thursday, Dale jumps into the wayback machine to look at Canon's eye-controlled focus, a promising technology introduced during the film era, but which never quite made the jump to digital. Read more

Updated: A look at the Panasonic DC-GH5's autofocus system

While the Panasonic DC-GH5's impressive video specs tend to steal the show, a ton of updates under the hood have made it a better sports shooter than you might expect. Check out how its updated autofocus system fares in our in-depth analysis. Read more

Maximum sharpness: Nikon's automated AF Fine Tune explained

Among the features introduced in Nikon's new D5 and D500 DSLRs, we're very excited by automated AF Fine Tune. This feature allows users to quickly fine-tune their specific camera bodies and lenses, maximising the chanes of a sharp shot and avoiding the lengthy process of trial-and-error tuning that was previously necessary. Watch our video and read our in-depth analysis

Sony Alpha 7R II can match or beat DSLR low light AF performance

When the Sony Alpha 7R II was announced, it promised a lot of game-changing features, but its low light AF capability was an unknown. We've already seen some of the incredible continuous AF abilities of the a7R II, including pinpoint eye AF for even moving subjects, but a lot of pros may be wondering: 'if I ditch my DSLR for some of the advanced AF features the a7R II offers, will I be sacrificing low-light AF performance?' Find out in our video

Analysis: Sony a7R II and RX100 IV autofocus systems

Sony recently shook things up with the announcement of the 42.4MP, backside-illuminated full-frame a7R II mirrorless camera, alongside stacked 1"-type sensors in the updates to the popular RX100 and RX10 lines. We put their new AF systems to the test in our brief hands-on time with the cameras recently. See videos of the cameras in action

Configuring your 5D Mark III AF for fast action

The Canon EOS 5D Mark III has a very sophisticated and complex AF System. The possible combinations to tweak the AF properties are basically unlimited, so especially for beginners it can be hard to assess which configuration will yield the best results.

Variation Facts and Fallacies
There is no such thing as a 'perfectly' calibrated lens or camera. Sample variation is a fact of life. In this article, Roger Cicala of Lensrentals explains what this means, and what - if anything - you need to worry about.
Busted! The Myth of Open-loop Phase-detection Autofocus
The myth that focus-locking phase-detection autofocus is an open-loop control system is "Busted!" This article provides tests you can use to prove it is not only a closed-loop control system, but that it's fundamentally the same process as continuous-focus and always has been.