Sony DSLR-A100K - alpha; Digital Single Lens Reflex Camera Brochure & Specs page 12

Shooting the digital way
CAMERA SYSTEMS
Optional conversion
lenses and filters
Attach optional conversion lenses for
additional focal lengths; attach filters
for stunning special effects.
Use the polarizing filter of the Sony VF-30CPKS to control
Selected Sony Cyber-shot ® cameras enable
reflections off water or glass. (Sample photos for
you to exceed the zoom range of the built-in
illustration purposes.)
lens, thanks to optional conversion lenses.
Or unleash your creativity with optional filters.
The DSC-W55 accepts the optional VAD-WB
lens adaptor, while the DSC-W200 accepts
the optional VAD-WD lens adaptor. These
adaptors enable you to mount optional
conversion lenses and special effects filters.
The DSC-H7 and H9 feature a 74mm lens
The neutral density filter of the Sony VF-30NK helps control
thread that accepts optional conversion
bright outdoor scenes, for images of more subtlety and
lenses and filters directly.
beauty. (Sample photos for illustration purposes.)
The star filter of the Sony VF-30SC lends a dramatic
touch to picture highlights. (Sample photos for
illustration purposes.)
Conversion lens adaptors extend the capabilities of
many Sony cameras. So you can shoot wider angles
and longer telephotos as well as take advantage of
polarizing, neutral density, star, and soft filters.
The soft filter of the Sony VF-30SC adds the right touch
of diffusion for romantic portraits, emotional subjects
and atmospheric landscapes. (Sample photos for
illustration purposes.)
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The image
sensor
After the lens, light passes from the subject
to an integrated circuit chip called the image
sensor. The sensor occupies the spot where
the film would be on a conventional camera.
Where film converts the incoming light to
chemical changes in the emulsion, the
image sensor converts light first into an
electric charge, then into analog voltage.
Some image sensors also take the next
step, converting the analog voltage into
digital bits.
Pixels and megapixels
While a film image is composed of discrete
chemical grains of irregular size and shape,
a digital image is composed of discrete
squares of color called pixels. The pixels
that form a digital image begin as discrete,
light-sensitive areas on the surface of the
image sensor.
One million pixels is called a "megapixel."
And it appears that everyone understands
that more megapixels are better. Here's why.
The more megapixels you have, the bigger
prints you can make at a given image quality.
More megapixels create images ready to
use in printed flyers and brochures. And
higher megapixel counts enable you to crop
the image or use digital zoom – without
sacrificing too much picture detail.
CAMERA SYSTEMS
VGA 3 MP 5 MP 8 MP 10 MP
480 1536 1944 2448 2736
200 200 200 200 200
dpi dpi dpi dpi dpi
2.4"
7.7"
9.7"
12.2"
13.7"
More megapixels mean finer detail and larger print sizes. Shown here: print sizes for high quality at 200 dots per inch.
(Sample photo for illustration purposes.)
PRINT DPI
PRINT SIZE 12 MP 10 MP 8 MP 5 MP
3 x 4 Inches 1000 912 816 648
4 x 6 Inches 750 684 612 486
5 x 7 Inches 600 547 490 389
8 x 10 Inches 400 365 326 259
11 x 14 Inches 286 261 233 185
16 x 20 Inches 200 182 163 130
20 x 30 Inches 150 137 122 97
KEY: Ideal picture quality Good picture quality Not recommended
Anything above 300 dpi is photo quality, shown in green. High quality printing, from 200 to 300 dpi is shown in orange.
Printing below 200 dpi will not yield high quality.
12 MP
Color
The pixels of the typical image sensor are
sensitive to all colors of light. Without
outside help, they can only see images in
"black and white." To capture color, they
3000
require the help of a color filter array. This
200
dpi is a mosaic of microscopic filters that permit
light of only one color – Red, Green or
Blue – onto each pixel. Red, Green and
Blue are the "additive primary" colors. This
means that different proportions of Red,
Green and Blue can be added to reproduce
any visible hue.
15.0"
3 MP VGA
512 160
384 120
307 96 The Bayer color filter array permits light of only one
color to fall on each pixel.
205 64
146 46
102 32
77 24
RED MAGENTA BLUE
YELLOW CYAN
GREEN
Different proportions of Red, Green and Blue can be
added to reproduce any visible hue.
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