Digital Cameras

1
Digital Cameras Scanners

• Technology Tools

2
Digital Cameras vs. 35mm Cameras

• Do not use film.
• Images convert to digital data (a long series of
  numbers that represents the color and brightness
  of millions of points in the image).
• Can see the image as soon as you take the picture.

3
Digital Camera Quality

• Resolution- the sharpness of the images it
  records, measured in megapixels
• Mega millions
• Pixels picture element or single dot in a
  digital image.
• Higher the megapixel the higher the quality of
  the camera and the images it takes.
• Allows for more flexibility when it comes to
  cropping, resizing, and printing out images.

4
Digital Camera Quality

• Inexpensive 2 MP or 3 MP Camera
• Takes 4x6, 5x7 or 8x10 prints
• Larger prints will look grainy (see individual
  dots of color)
• 4 MP or 5 MP Cameras
• Becoming more affordable
• Can print larger photos (11x14 and up)
• Expensive High Megapixels
• Professional Photographers 14 MP
• Cost over 4,500

5
Digital Camera Quality

• Zoom lens - Make sure that it is a true zoom.
• Some cameras claim to have zooming abilities,
  however they simply capture and magnify fewer
  pixels, thus enlarging the image.
• This is often referred to as "digital zoom".
• "Optical zoom" actually moves the lens of the
  camera when photographing to magnify your
  subject.
• Why have a zoom lens
• Getting better quality images when capturing
  sporting events, wildlife, or a concert from afar.

6
Digital Camera Storage

• Images are stored on flash memory cards, mini
  CDs or mini DVDs.
• Small, powerful and can transfer digital
  information between your camera and computer or
  printer.
• To fit more on a memory card, CD or DVD
• Select different file types in order to compress
  or squeeze the image data into less space.
• When you compress you lose some of the detail.
• TIFF files record all of the original image
  information and are larger than JPEG.
• JPEG files compress just a bit, keeping most of
  the details.

7
Preparing Camera Taking Photos

• Make sure battery is charged.
• Digital cameras consume a great deal of power.
• Make sure flash card, CD, or DVD is installed and
  has enough room.
• Set camera resolution
• Highest resolution and save as uncompressed data
  (TIFF) if you are planning to enlarge the
  image.
• Lowest resolution and save in a compressed JPEG
  format if you are using it on a web page or are
  saving space.

8
Transferring Photos

• Use a photo printer connect camera or insert
  flash card, CD, or DVD into the printer and print
  out the photos.
• Transfer Photos to Computer
• Connect the camera to the computer with the USB
  port cable.
• Insert Flash Card into flash card slots on the
  computer or printer.
• Insert CD or DVD into the drives.
• Photos are then saved, emailed to others, printed
  out, or taken into photo editing software for
  some work.

9
Digital Camera Costs

• Camera Cost
• 3 - 5 MP 120-300, 6 - 8 MP 300-1,500
• 9 MP 800-3,800
• Extra Batteries
• AAs, either nonrechargeable alkaline
• Rechargeable nickel metal hydride (NiMH)
• High-capacity disposable CRV3s (some cameras take
  two CRV3s)
• Flash Cards, CDs, DVDs
• CompactFlash, Secure Digital Cards, and
  SmartMedia cards cost about 20 for 512MB, or 80
  for 4G.

10
Sites for Shopping for Digital Cameras

• Tips on Buying a Digital Camera
  http//www.pcworld.com/article/125645-1/article.ht
  ml
• Break down of the camera specs http//www.pcworld.
  com/article/id,125645-page,3/article.html

11
Scanners

• Convert paper text and images into digital
  formats.
• Place any flat material on the glass surface and
  it converts it to a digital file.
• Most scanner software allows you to store the
  image as TIFF files or in compressed form as JPEG
  files.
• Some scanners allow you to scan film negatives or
  slides.

12
Scanner Quality

• Resolution is measured in dots per inch (DPI).
• Most can digitize a document at 2,400x4,800 dpi
  in color or gray-scale.
• For displaying photos on the Web or printing
  3-by-5 or 4-by-6 snapshots, 100 dots per inch is
  plenty of resolution
• For capturing text using optical character
  recognition, 300 dpi is standard.

13
Scanner Quality

• 8x10-inch or larger photo prints or to enlarge
  smaller images, opt for a scanner with 1200 dpi
  or 2400 dpi of optical resolution.
• More flexibility in editing your image if you
  start with the highest possible resolution.
• Be warned - high-resolution images take up a lot
  of hard disk space and takes time (ex. a
  1200-dpi, 4-by-6-inch photo can consume 25MB)

14
Different Types of Scanners

• Flatbed scanners
• Sheet-fed scanners - they have decreased in
  popularity because they're less versatile than
  flatbed scanners
• Work best for individual text pages.
• You feed the document you want scanned through a
  feeder, much like a fax machine.
• Photographs can emerge bent out of shape--and you
  can't cram a book through a feeder.
• Handheld scanners
• Photo scanners
• Multifunction peripherals that incorporate a
  printer, scanner, and fax machine into one
  device.

15
Cost of Scanners

• Flat Bed Scanners - 150-350, up to 1,000
• Scanners with Printers, Faxes, and Copiers all in
  one Inkjet 90-500, Laser 250-700

16
Web Sites for Scanner Help

• How to Buy a Scanner
• Break down on the scanner specs
• Tips on shopping for a scanner http//www.pcworld.
  com/article/id,125819-page,1/article.html