Posts Tagged ‘speed’
Earlier this month, Canon announced that there’s a firmware update for the Canon EOS M on the way that will boost the mirrorless camera’s sluggish autofocusing speeds by up to 2.3x. Given that AF slowness is one of the biggest gripes EOS M owners have with the camera, the news was likely music to many a EO M owner’s ear.
If you want to see what this 2.3x looks like in real life, Korean photographer Daero Lee has published a number of comparison videos showing updated and non-updated EOS Ms focusing on things.
There was a great deal of excitement when Canon entered the mirrorless camera market with the EOS M last year, but much of the buzz evaporated when people began putting the camera through its paces. Although the camera features impressive image quality, one of the biggest issues is the sluggish autofocus that often gets in the way of capturing “decisive moments.”
If you’re the not-so-proud owner of a EOS M who constantly grumbles about the AF, here’s some news that’ll be music to your ears: your camera is set to receive a major AF speed boost by way of a firmware update.
Canon’s DSLRs come with a variety of continuous shooting speeds, ranging from 2.5 frames per second on the 300D (AKA Digital Rebel/Kiss Digital) to a whopping 14 frames per second on the high-end 1D-X. If you want to get a taste of what these shutter speeds sound like on the actual cameras, check out the comparison video above by YouTube user dochero2005.
A little while ago, we introduced you to photographer Ed Pingol’s Cullinator, a Mac app that played nice with a PC gaming controller and helped you to significantly speed up your Lightroom workflow. As many of you pointed out, however, the Cullinator could easily be turned into a DIY project, and it looks like photographer Paul Snow of Photo Thoughts was listening.
Is your Adobe Lightroom running slowly on your computer? Adobe regularly receives questions through social media regarding sluggish photo editing, and recently decided to start compiling the non-traditional solutions that work onto a single helpful page. In the Lightroom Help section of the Adobe website, there’s now a page titled “Performance hints“.
Back in June, a National Geographic crew was given the task of filming and photographing a cheetah running at full speed. While there are plenty of videos and photos out there showing this, the magazine wanted to track alongside the cheetah as it ran (rather than simply capture it from a fixed location). The short behind-the-scenes video above shows how they went about doing this.
Photographer Jeff Cable purchased a couple Canon 5D Mark IIIs recently and discovered that although the camera offers both SD and CF card slots, you should avoid the SD slot if you want maximum shooting speed. He writes,
[...] for some reason unbeknownst to me, Canon decided to build the 5D Mark III with one very fast CF slot which supports the newer UDMA7 protocol and a standard SD card slot which does NOT support the high speed standard [...] Without UHS [Ultra High Speed] support, the top speed that can be achieved by the SD card is 133x. This is true even if you purchase a 600x SD card and insert it in the camera. The best you will get is 133x
It turns out that the camera will default to the slowest card inserted. So, if you have a 1000x CF card in slot one and any SD card in the second slot, the very best buffer clear that will achieve is 133x.
It might not be a big deal for most photographers, but if your line of work requires clearing the camera’s buffer as quickly as possible, it something you might want to be aware of.
Image credit: Photograph by Jeff Cable
Contrast detection is one of the two main techniques used in camera autofocus systems. Although focusing speeds continue to improve, the method uses an inefficient “guess and check” method of figuring out a subject’s distance — it doesn’t initially know whether to move focus backward or forward. UT Austin vision researcher Johannes Burge wondered why the human eye is able to instantly focus without the tedious “focus hunting” done by AF systems. He and his advisor then developed a computer algorithm that’s able determine the exact amount of focus error by simply examining features in a scene.
His research paper, published earlier this month, offers proof that there is enough information in a static image to calculate whether the focus is too far or too close. Burge has already patented the technology, which he says could allow for cameras to focus in as little as 10 milliseconds.
Google scientist Sam Hasinoff has come up with a technique called “light-efficient photography” that uses focus-stacking to reduce the amount of time exposures require. In traditional photography, increasing the depth of field in a scene requires reducing the size of the aperture, which reduces the amount of light hitting the sensor and increases the amount of time required to properly expose the photo. This can cause a problem in some situations, such as when a longer exposure would lead to motion blur in the scene.
Hasinoff’s technique allows a camera to capture a photo of equal exposure and equivalent depth of field in a much shorter amount of time. He proposes using a wide aperture to capture as much light as possible, and using software to compensate for the shallow depth of field by stacking multiple exposures. In the example shown above, the camera captures an identical photograph twice as fast by simply stacking two photos taken with larger apertures.