Camera Related Terms
Phones, now a days, are not simply meant to call. They aim at providing every basic facility to the user ranging from clock to camera. Your phone is your camera, your gaming console and also your friend (Hye Siri!). If you want to choose a phone with a good camera, what factors should you consider? Is it just the Megapixels? No.
Let's have a look at various factors to consider while buying a smartphone for photography.
Smartphone Camera Choice:
When you want to buy a smartphone, outta all the specifications the most luring one is its camera. Camera is not all about Megapixels... Actually, there are many factors affecting the quality of picture taken by the camera. Some of the important factors are listed below:
Aperture Size:
Some softwares like AfterFocus are also available to blur background or foreground after the picture has be taken. Click this link to get AfterFocus App for free : AfterFocus for Free
Large aperture (f/1.8).
Small aperture (f/16).
Summary: Large aperture, background out of focus; small aperture, everything in focus. (Large aperture = smaller f-number, small aperture = larger f-number).
Shutter-Speed:
It's basically how long the sensor/film in the camera is exposed to light. How long the shutter stays open depends on how much light there is. For pictures with the same aperture setting, if the is shutter open too long, the picture will be too bright, and if it's not open long enough, the scene will be too dark. Therefore, you control the overall exposure (lightness and darkness) of the scene with both the aperture and shutter speed control.
What you can do with shutter speed is freeze motion with a fast shutter speed or capture movement with a slow shutter speed.
Summary: Fast shutter speed = freeze action. Slow shutter speed= Blurry motion.
In most of the smartphone cameras, this is simplified i-e both Shutter speed and aperture are given as a function of exposure. You change exposure, you change both the aperture size and the shutter speed. Exposure, in simplest terms is the amount of light incident on the film or sensor. When you increase exposure, aperture is increased and the shutter speed is decreased, thus allowing more light to enter the sensor.
Optical Image Stabilization (OIS) and Digital Image Stabilization:
There are two types of image stabilization, one being the optical image stabilization .. while the other one is Digital image stabilization.
Sometimes the image appears blurry due to the shaking of hands. To reduce this blurriness, we employ image stabilization techniques such as OIS. Gyroscope effectively detects the motion of the camera, and the lens will physically move in the opposite direction of the motion to counter the shake induced on a phone.
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| Blurred photo effect |
Smartphone Camera Choice:
When you want to buy a smartphone, outta all the specifications the most luring one is its camera. Camera is not all about Megapixels... Actually, there are many factors affecting the quality of picture taken by the camera. Some of the important factors are listed below:
Aperture Size:
Aperture is the opening in the camera through which the light enters. The greater the size of the aperture, the more the light entering through it. This light strikes the sensor or the film behind the opening. The sensor senses the intensity of the light.
The size of the aperture is represented in terms of 'f/Number'. The larger the Number the smaller is the size. Just like in case of f/16 ... the size is small while the size is large for f/1.8 .
Now, lets get on to why this matters and how it can change what your picture looks like. Basically, a larger aperture (like f/1.8) will have your subject in focus, and everything in front of and behind it blurry. A smaller aperture will have your subject in focus and everything in front of and behind it quite focused as well. Take a look at the following diagram; the further apart the lines are, the more out of focus something is:
Some softwares like AfterFocus are also available to blur background or foreground after the picture has be taken. Click this link to get AfterFocus App for free : AfterFocus for Free
Large aperture (f/1.8).
Small aperture (f/16).
Summary: Large aperture, background out of focus; small aperture, everything in focus. (Large aperture = smaller f-number, small aperture = larger f-number).
Shutter-Speed:
It's basically how long the sensor/film in the camera is exposed to light. How long the shutter stays open depends on how much light there is. For pictures with the same aperture setting, if the is shutter open too long, the picture will be too bright, and if it's not open long enough, the scene will be too dark. Therefore, you control the overall exposure (lightness and darkness) of the scene with both the aperture and shutter speed control.
This is more effective than digital stabilization, as there is real physical movement involved here. Digital stabilization simply takes the image or video and crops out parts that are shaking, resulting in lower resolution images, and slower time to process the stabilization.
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| In the first picture, image stabilization is off. |
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