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Questions and Answers
What type of lens is known for its ability to focus vertically and horizontally lines at the same time?
Which lens is known for partly correcting chromatic aberration and avoiding fringes of various colors in images?
What type of lens has a much flatter field and better color correction than the anastigmatic lens?
Which lens type is used in the focusing assembly/mechanism of the camera?
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What type of lens includes two component glasses that can be used both separately and in combination?
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Which lens type is corrected for chromatic aberration?
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Which of the following lenses is specifically noted for being used by photo engravers requiring microscopic definition in their copy work?
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Which lens type is corrected for distortion?
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Which lens type is corrected for astigmatism as well as other lens defects?
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What does the term 'lens aperture' refer to?
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Which lens type has a higher degree of correction to color and also corrects astigmatism?
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What does the lens diaphragm control?
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What is the main function of the aperture in a camera?
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Which part of the camera controls the length of time that light is allowed to enter for exposure?
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What defines a camera lens?
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Which type of lens found in simple cameras like box cameras is not corrected for any aberrations?
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What is a Rapid Rectilinear Lens known for correcting?
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What type of lens is a Rapid Rectilinear Lens?
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Study Notes
Types of Lenses
- Anastigmatic Lens: free from astigmatism and other aberrations, focuses vertically and horizontal lines simultaneously
- Achromatic Lens: partly corrected for chromatic aberration, images projected are free of fringes of various colors
- Process Lens: super corrected lens with a flat field and good color correction, used by photo engravers
- Convertible Lens: two-component lens that can be used separately or in combination
- Fixed Focused Lens: used in inexpensive cameras, has a short length and proportionate depth of field
Lens Aberrations
- Chromatic Aberration: corrected by Achromatic Lens
- Astigmatism: corrected by Anastigmat Lens
- Distortion: corrected by Rapid-Rectilinear Lens
- Higher degree of correction to color: corrected by Apochromatic Lens
Lens Diaphragm and Aperture
- Diaphragm: metal diaphragm that can be expanded or constricted to control the amount of light passing through the lens
- Aperture: the diameter of the lens opening, indicated by f-numbers
- Function of Diaphragm: controller of speed, depth of field, and definitions
- Diaphragm as controller of speed: regulates the amount of light passing through the lens
Camera Lens Definition
- Camera Lens: a transparent material made of glass or plastic with two opposite symmetrical and spherical surfaces
- Function of Lens: refracts light rays to form an image of an object
- Lens: permits light to pass through, changing the direction of light rays to form an image
Seven Main Groups of Lenses
- Simple Meniscus Lens: found in simple cameras, not corrected for any aberrations
- Rapid Rectilinear Lens: a combination of two achromatic elements, corrected for some aberrations but not astigmatism
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Description
This quiz covers various types of camera lenses, including the telephoto lens, anastigmatic lens, achromatic lens, and process lens. Test your knowledge on different lens characteristics and functionalities.
