SENSOR SIZEThere are several sizes of image sensors , one of which is a full - frame which has the same size as the film frame 35m . Knowledge of how important the size of the sensor is vital in photography , why ? let's consider the following reasons :
The size of the image sensor determines the focal length of the lens that is used by the camera .
Larger sensor size is generally able to produce better image
quality , because the pixels are larger and will produce less noise .
The larger the sensor , then the price will also be more expensive .
Camera has a larger sensor will have a larger viewfinder anyway .
Sensors provide a large depth of field is narrower than the small size of the sensor denggan .
Sensor
- full-frame sensor camera models can be found in semi - pro and pro ,
and has the same dimensions as a frame of 35mm film . Size resolution full frame camera can be said to be very high : Canon
EOS - 1Ds Mk III has 21.1 million pixels , the Sony Alpha 900 has 24.6
megapixels , while Nikon D3x has 24.5 million pixels .
APS
- H sensor used in the EOS - 1D camera and looks like it is intended
for sports and wildlife photographers who need a little extra function
of sensor size kecil.APS - C sensor size is the most widely used , Buddy
can find in many DSLR cameras , even at CSC cameras Sony and Samsung.Sensor Four - Third is the smallest sensors of all existing sensors . The following are measures of the sensor :
Full Frame : 36x24mm
APS - H 28.7x19.1mm
APS - c : 23.6x15.5mm ( Nikon , Pentax , Sony )
APS - C : 22.3x14.9mm ( Canon )
Four - Thirds : 17.3x13mm
Nikon CX - format : 13.2x8.8mm
PentaxQ : 6.17x4.55mm
SENSITIVITY LIGHT
In
the film era , ISO ( Internation Standard Organisation ) representing
the degree of sensitivity to the film , this system also digunalan on
the image sensor . The lower the ISO level is used , the lower the sensor 's sensitivity to light , and vice versa . But
one thing to remember is when my friend raise the ISO the potential for
noise will be greater , and this noise may not want pal . ISO range varies at each sensor but is generally in the range of ISO 100-6400 .
Some
high-end cameras offer the lowest iso up to 50 digits and a maximum of
up to 102,400 ISO , high ISO is able to take pictures at night . Most cameras now also has its complement with Noise Reduction .
RESOLUTION IMAGES
An image sensor is formed of millions of pixels . The more pixels that are owned by the sensor , the higher the resolution . Millions of pixels is written as megapixels , so the 12 million pixel sensor with 12 megapixels will be written . Buddy may often hear that the bigger the pixel size the better the image quality , but it is not entirely true opinion ! Sensor
size also plays a role , as we have mentioned at the beginning that the
larger pixels on the sensor are also larger in general will provide a
good quality . image processor , optical lenses and also has its own role to the quality of the image .
SENSOR AND LENS
If
my friend had read or heard about the relationship between image and
lens senosr might sound a bit confusing , but my friend will get used if
it has gained some experience . If my friend has two identical lenses that can be mounted on cameras
with full-frame sensor and APS - C , then the friend will see the
results with different magnifications .
Each sensor has a crop factor , which must be multiplied by the focal length to provide an effective focal lenth used . For
example : APS-C sensor has a crop factor of 1.5x ( 1.6x on the Canon ) ,
and four- third sensor has a 2x crop factor , so if my friend using a
50mm lens on a Four - Thirds sensor camera the effective lens focal
length is 100mm . Images produced is equal to the yield on a 100mm on a 35mm film camera or full-frame sensor . 100 - 300mm lens used on a Nikon DSLR that bersensor APS-C has an effective focal length of 150 - 450mm . Here is a complete data at each sensor crop factor :
- Full Frame: 1x
- APS-H: 1.3x
- APS-C: 1.5x (Nikon, Pentax, Sony)
- APS-C: 1.6x (Canon)
- Four-Thirds: 2x
- Nikon CX-Format: 2.7x
- Pentax Q: 5.5x
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