A digital single-lens reflex (DSLR) camera uses an interchangeable lens and digital imaging sensor similar to a film SLR camera. Key features of DSLRs include a mode dial, dust reduction system, interchangeable lenses, HD video capture, and a live preview. Digital photos are made up of pixels, and a camera's megapixel rating determines the maximum photo resolution and largest high-quality print size possible, such as an 8 megapixel camera allowing for a 12" by 16" print. However, a higher megapixel camera does not necessarily produce better quality prints than a lower megapixel camera for the same print size.

1. Introduction to DigitalIntroduction to Digital
Single-Lens ReflexSingle-Lens Reflex
CameraCamera
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2. What is aWhat is a Digital Single-Digital Single-
Lens Reflex CameraLens Reflex Camera??
A Digital Single-Lens Reflex camera
(also called a ) is a
digital camera including the
mechanism of a single-lens reflex
camera with a digital imaging sensor.
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digital SLR or DSLRdigital SLR or DSLR

3. FeaturesFeatures
Mode dial
Dust Reduction system
Interchangeable lenses
HD video capture
Live preview
Wider angle of view
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4. Digital Photos OverviewDigital Photos Overview
 Digital Photos are made up of pixels (picture
elements).
 The resolution of a digital photo is its pixel dimensions.
 Digital Cameras use megapixelsmegapixels to specify the pixel
dimensions of its photos.
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5. MegapixelsMegapixels
 A higher megapixel rating does not always mean
higher quality photos.
 A camera’s megapixel rating will help you
determine the largest size of prints you can expect
to make without sacrificing the quality of the image.
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The following guide will help you know what
size of high-quality print you can expect from
each megapixel rating.
Megapixels Pixel Dimension Max Quality Print Size
2.0 1600 x 1200 4” x 6”
3.0 2100 x 1500 5” x 7”
4.0 2400 x 1800 8” x 10”
5.0 2500 x 1900 9” x 12”
6.0 3000 x 2000 11” x 14”
8.0 4000 x 2000 12” x 16”

7. MegapixelsMegapixels
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4 megapixel
8 megapixel
2400 x 1800
4000 x 2000
8” x 10” print
The 8 megapixel will not produce a better quality
8” x 10” print than the 4 megapixel.