When everything is important, Nothing is Important
Archive for August, 2010
Filters
Aug 25th
Light filters in the form of translucent glass (having a flat thickness). Filters installed at the front edge of the lens.
There are several types of filters, including:
- Color Filters :
Filter that consisting of a sheet of color polarisator. - Conversion Filters: Filter consisting of a piece of polarisator with color conversion filter. Used to give a brighter effect.
- Fider Filters : Filter consisting of two linear PL filter are combined into one.
- Circular Polarizing Filters : Filters are used to eliminate reflections from all the shiny surface, adding color saturation and is useful for the color blue sky.
- ND Filter : This filter serves to reduce the power of light
- Nebula Filter : Filter which produces images with the effects of radial rays that had rainbow.
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Lens Types
Aug 22nd
The lens is part of the door opening for entering light into the camera. The lens collects light from an object and project it into film.
Lens is the important parts of a camera because the lens determines the resulting picture. Either its a good picture or a bad picture. The lens aperture size determines the amount of light entering. If the lens aperture diaphragm is too large, then the light coming in too much so that the resulting picture will be too bright (over-exposure). Conversely, if the lens diaphragm aperture is too small then the light coming in too little so that the resulting picture will be dark (under-exposure).
Lenses are usually written on the strength of the lens opening, as on the camera lens Canon EFS 18-55mm: ‘CANON ZOOM LENS EFS 18-55mm 1:3.5-5.6 IS’. Thus, the mean power of the lens at aperture f/3.5 maximum aperture at 18mm and f/5.6 at 55mm.
The types of lenses in cameras, namely:
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