AF Sensor
From Nikonians Wiki - FAQs, Photo Glossary, Good Photo Locations, Help
Jump to: navigation, search ...
AF Sensor
Sensor used to detect focus.
Search SWPP and BPPA
Information provided by: SWPP BPPA
More Photographic Terms ...
AF sensor:
The sensor used to detect and help correct the focus in cameras equipped with an autofocus function.
algorithm: ...
-AF Sensor - the sensor used to detect focus.
-Aftertreatment - the treatment of negatives and prints to correct certain faults in exposure and development, or to create special effects.
AF sensor
The sensor used to detect focus in cameras equipped with an autofocus function. Algorithm - a rule or process (often mathematical) used by a computer to make a decision or series of decisions.
AF
Abbreviation for " Autofocus ".
AF sensor (mirror flip) autofocus only
- Three mode AF (Imager, AF sensor, Hybrid)
- Face Detection
Flash ...
The AF sensor coupling may help to reduce the underexposure risk in the image above because the selected AF point to a relatively dark spot (= different to the TTL flash metering result).
When an AF sensor is active, it lights up clearly in red. When several of them are active, they light in red. When they are inactive, which is almost all the time, they disappear. Bravo! ...
Having multiple AF sensors, particularly if they are arranged in a pattern that allows you to move the focus both horizontally and vertically, is a huge help in staying focused on a subject that is not in the center of your frame.
The system utilizes a beam splitter (implemented as a small semi-transparent area of the main reflex mirror, coupled with a small secondary mirror) to direct light to an AF sensor at the bottom of the camera.
Similarly, it is easier to pan with the subject and keep the active AF sensor(s) on the subject with handheld outfits. And even when shooting static subjects with the 300 IS, you reap the same benefits: speed, maneuverability, and ease of use.
Since the most common type of AF sensor is the vertical line sensor, it may also be worth considering whether your focus point contains primarily vertical or horizontal contrast.
The distance to that subject is a secondary result, but it's neither required for the AF process to work nor is it measured by the AF sensors.
Autofocus term used by Nikon, the AF sensor detection continues as long as shutter release button is lightly pressed and the reflex mirror is in the viewing position. Useful when the camera-to-subject distance is likely to change.
Contrast Grade ...
AF-S: Autofocus Silent Focusing is driven by a "Silent Wave" motor in the lens instead of the focus drive motor in the camera. AF-S lenses focus faster than standard AF-NIKKORs and almost completely silently. Find out more.AF Sensor The AF ...
Nikon D2X/D2Xs - How to test the actual size, width and position of the AF Sensors
Learn how to test and avoid most autofocus problems on most DSLRs
by Nikonian Darrell Young (DigitalDarrell) ...
A few modern cameras lack an AF-assist light but their AF sensor is sensitive enough in low-light to focus properly.
Now of course an inexpensive low-end camera won't have the manual exposure control, focussing speed (AF speed is determined by both the lens motor and the speed of the camera's computer and AF sensors) and film-winding motordrive speed to make full ...
However, the AF sensor "saw" the bit of green foliage instead of my bear so I got bad front focus. You can see the soft focus on the bear and a close up of the approximate AF area in the 50% magnification screen capture on the right.
at 24fps, up to 20-minutes of continuous video recording; 3-inch LCD with 920K dot resolution, Live View, 6fps burst rate, up to 100 JPEG images per burst; 2,016-pixel RGB 3D Color Matrix Metering II with Scene Recognition; 3D tracking AF sensor with ...
EOS digital cameras (i.e. 5D, 1000D, etc.), where the camera automatically switches between One Shot mode and AI Servo mode (AI refers to 'artificial intelligence'). AI Focus AF initially begins in One Shot Mode, and when the camera's AF sensor ...
These marks delineate where the autofocus sensors are going to lock on when you press the shutter button halfway. If the AF sensor is on the tree 20 feet behind your subject, that's where the camera will focus.
To ensure that your main subject is sharp, pay careful attention to the AF sensor indicators inside of your camera's viewfinder. The selected sensor will be different (depending on your camera).
I will only say that if one can obtain an exact desired lock onto the subject, then by all means go ahead and use the AF mode, however, I think at present there really is no substitute for manual focus because even the most sophisticated AF sensors ...
 See also: AF, Sensor, Focus, Camera, Image
  
|
RSS
