3. What is camera lens?
⢠A camera lens (also known as
photographic lens or photographic objective)
is an optical lens or assembly of lenses used in
conjunction with a camera body and
mechanism to make images of objects either
on photographic film or on other media
capable of storing an image chemically or
electronically.
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4. History
⢠The invention of the camera in the early 19th
century led to an array of lens designs intended
for photography. The problems of photographic
lens design, creating a lens for a task that would
cover a large, flat image plane, were well known
even before the invention of photography due to
the development of lenses to work with the focal
plane of the camera obscura.
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5. There are four types of lenses
And they are:-
⢠Normal
⢠Wide angle
⢠Telephoto
⢠Zoom
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6. 1.Normal Lens
⢠This lens is called ânormalâ because it has little if
any magnification compared to your eye
⢠This is the cheapest, and most often used lens
⢠It offers a very wide aperture (ie.- f1.8, f1.7, or
even f1.4
⢠This is the lens we have used up until this point
on the cameras in this class
⢠Has a focal length of 50mm
8. 2.Wide angle Lens
⢠Offers an increased angle of view.
⢠Allows you to take photos in an area
where space is limited.
⢠Offer a very good depth of field.
⢠Interesting effects,exaggerated sense of
perspective.
⢠Available in both rectilinear and fisheye
⢠Has a focal length of less than 50mm
(usually less than 35mm)
10. Telephoto Lens
⢠These lens range between 70 â 1000mm!
⢠They tend to give your photo a âflatâ look
⢠You must use a very fast shutter speed with these
lenses over 200mm.
⢠These offer little depth of field.
⢠Allow you to get a photo without getting
too close to your subject.
⢠Larger lenses need a stand for the lens,
not the camera.
12. Zoom Lens
⢠This lens has variable focal lengths
⢠Fewer lenses to carry
⢠You can do âcoolâ special effects with them.
⢠They tend not to have very wide maximum
apertures (ie f5.6).
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