INTRO TO DIGITAL CAMERA
A digital camera is a camera that encodes images DIGITALLY and stores them for later reproduction of image.
Steven Sasson who worked as an engineer at Eastman Kodak invented & built the first Digi cam in 1975.
Today Nikon and Canon are the front runners in Digi Cam manufacturing.
SPECIFICATIONS TO WATCH FOR
1. SENSOR TYPE AND SIZE2. IMAGE PROCESSOR3. RESOLUTION4. APERTURE OF THE LENS5. ISO SENSITIVITY6. SHUTTER SPEED7. VIDEO CAPABALITIES
SENSOR SIZESensor size is the dimensions of
the array of photoreceptors that create the pixels that become an image.
Bigger sensors generally produce better photo quality, but the bigger the sensor the bigger the camera.
Larger sensors are also more expensive to make, so the cameras are pricier.
IMAGE PROCESSORAn image processor,also called
as media processor,is a specialised digital signal processor used for image processing in digital cameras,mobile phones etc.
Noise reduction & Image sharpening are done by the processor.
PROCESSORS OF VARIOUS COMPANIES
NIKON - EXPEED
CANON – DIGIC
SONY – BIONZ
SAMSUNG – EXYNOS
OLYMPUS – TruePic
PENTAX - PRIME
RESOLUTIONResolution is the capabality of
the sensor to observe or measure the smallest object clearly with distinct boundaries.
In genral,its the pixel count in the sensor.
If a sensor has N pixels horizontally and M pixels vertically,then the resolution of the camera is said to be MxN Pixels.
Higher the resolution,better the picture quality.
APERTURE OF THE LENS
The aperture is the size of the opening that lets in light, alternatively referred to as an f-stop or f number.
The lower the number the larger the aperture.
As aperture size increases, the area of sharpess in front of and behind the subject increases
ISO SENSITIVITY
A camera's sensitivity to light is specified as ISO
sensitivity.
The higher the number, the better the camera's
ability to shoot in low light.
Higher the ISO,more grains in the image.
For instance, a camera rated up to ISO 6400 will
probably produce decent images up to ISO 800.
Normal ISO range is from 200 to 1600 in most of
DSLR’s.
SHUTTER SPEED
Shutter speed controls how long the
camera spends collecting light i.e how
much light is taken in at once.
It is measured in fractions of a second.
More the shutter speed,less risk of blur.
VIDEO CAPABALITIES
The video capabality of a camera is
measured by the unit frames per
second(fps).
Higher the fps,smoother the video.
These days cameras come with
either 30 or 60fps.
OTHER SPECIFICATIONSLCD SCREEN SIZE,TYPE & RESOLUTIONIMAGE STABILIZATIONAUTO FOCUSZOOMDIFFERENT FILTERS / EFFECTSSTORAGEBATTERY LIFEWIRELESS CONNECTIVITYWEIGHT AND SIZEWEATHER SEALED