Examples of using Phase detection in English and their translations into Vietnamese
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What's phase detection autofocus?
In comparison, the Dual Pixel CMOS AF system on the EOSR performs AF using only phase detection.
Phase detection function is achieved by analyzing and calculating.
It can shoot 1080i60 video and combines both phase detection and contrast detection autofocus.
Much like the Mate 10 and Mate 10 Pro, the P20 Pro features a 4-way hybrid autofocus system comprising laser, depth,contrast and phase detection.
Focus: laser focus Phase detection focus Contrast detection focus.
The other feature that the Mavic 2 Pro doesnot have is the continuous autofocus phase detection and contrast detection. .
This means that the camera uses phase detection AF for speed, and contrast detection AF for greater precision.
The problem with the secondary mirror, is that it has to be positioned at a perfect angle anddistance for phase detection to work accurately.
With mirrorless cameras and phase detection sensors placed directly on the imaging sensor, this limitation can be lifted.
Most conventional stillcameras use a combination of contrast detection and phase detection to achieve AF when shooting video.
In 8fps CHmode the camera can only use phase detection for focusing, so you're limited to 3×3 or 5×3 groupings in the centre of the frame.
Samsung claims a maximum autofocus speed of 0.08seconds courtesy of the Samsung NX300's combined phase detection and contrast AF system.
Contrast Detection is often more accurate than Phase Detection, especially in challenging or low-light situations.
Dual Pixel CMOS AF, which is one of the key features on the EOS 6D Mark II, is, in a broad sense,a feature that falls under technology known as phase detection AF.
In Sony's 2×2 OCL sensor,all pixels can be used for both imaging as well as phase detection instead of the conventional splitting of duties.
These focus points are a part of“Phase Detection AF”, so each one of the focus points can be used by the camera AF sensors to detect contrast.
Focus setting allows you to use the wheel, joystick ortouch screen to move your focus point to any of the 693 on sensor phase detection points.
Secondary Mirror and Phase Detection Accuracy: you might already know that all DSLR cameras with phase detection autofocus system require a secondary mirror.
The imaging system is benefited by the intelligent hybrid AF system,which uses both contrasts and phase detection methods to acquire focus quickly and accurately.
Phase Detection and Lens Calibration Issues: the problem with the traditional DSLR phase detection system not only lies with the secondary mirror alignment issues, but also requires lenses to be properly calibrated.
Contrast-detection is already possible anywhere in the imaging sensor,while on-sensor phase detection will eventually get to the point where focus points will be distributed all over the sensor.
Dubbed X-Trans II, the new sensor offers 25% higher resolution than in the X100, a better signal to noise ratio(30% lower noise, or about a one-stop ISO advantage)and on-chip phase detection elements for faster focusing.
As for the multimedia part we find a goodrear camera from 12Mpx f/ 2.2, phase detection autofocus, dual-LED(dual tone) flash, 1/ 2.9"sensor size, 1.25 μm pixel size and a selfie camera from 5Mpx.
The nice thing about Contrast Detection, is that you can use any part of the image(including extreme corners)on your sensor to acquire focus, while with Phase Detection, you must use one or more of the focus points on your DSLR.
Sony also uses a combination of phase detection autofocus(PDAF) and contrast detection autofocus(CDAF), which works well, but does not seem to be able to match Canon's Dual Pixel Autofocus when it comes to accuracy in situations of low light, or when shooting subjects that have limited contrast.
It features powerful in-camera stabilization, andits rapid BIONZ X image processor matched with a 693-point phase detection AF system covers 93% of the image area for accurate and quick subject tracking in a variety of lighting conditions.
In addition, most mirrorless cameras donot have an opening under the mirror to house a phase detection sensor and other components, so there is very little chance for dust to circulate after the chamber+ sensor are fully cleaned.
That still doesn't tell us much, but Sony, which makes cameras for the iPhone, has just announced a new 21MP stacked CMOS sensor,the highlights of which are 192 point phase detection autofocus, which makes it easier to stay focused on fast moving objects, and HDR for high-resolution images and 4K videos.