Choosing and Using a Digital Camera Kevin Amboe Surrey School District 2006.
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Transcript of Choosing and Using a Digital Camera Kevin Amboe Surrey School District 2006.
Choosing and Using a Digital Camera
Kevin Amboe
Surrey School District
2006
Film vs Digital
• Low Priced• Very High Resolution• Lots of Accessories• Better Exposure Control• Easy to make prints• True Point and Click
success
• Prices are coming down• Resolutions are
increasing• Post Processing • Can control exposure• Can print your own• Point and click not
always successful
Types of Cameras• Low End / Integrated
– 1 - 3 megapixels– Cell phone– Palm pilot
• Mid Range– 3 to 5 megapixels– Zoom Lens– Removable storage
• High End– Better Optics– 5 or higher megapixels– Advanced controls– Advanced file saving
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Lenses
• Glass vs. Plastic
• Optical Zoom is critical
• Digital Zoom decreases quality
• Progressive Zoom
• Filter / Protective Adapter
• Removable Lenses
Features
• Manual Controls• Program Modes• Ease of Use• Ergonomics• Size• Flash - off body• Batteries• Movies and Sound
Manual Controls
• Aperature– Fstop - how much light gets in– Lower works better in low light– High provides better focal range
• Shutter Speed– Seconds to 1/30 to 1/2000th of a second– Slower allows blurring - Faster for high
action
Program Control
• Portrait
• Sport
• Scenery
• Macro
• Snow
• Backlight
Ease of Use / Ergonomics
• Charging / Changing Batteries• Hand Position• Downloading• Changing Settings• Choose size for type of use
– Larger for sturdy– Smaller for easy carrying
Flash
• Must synchronize with shutter speed
• Usually good 10 to 20 feet only
• Away from camera body is better
• Red Eye reduction
Batteries
• Double AA Alkaline (1.5V)
• Double AA rechargable( 1.35 V)
• NiMH
• LiOH
More Features
• Digital Storage
• Image Resolution
• File Type
Digital Storage
• Floppy, CD, DVD
• Compact Flash
• Smart Media
• Secure Digital / xD
• Memory Stick
• Ideally want 2 x 512 MB
• File Type - JPEG - RAW - TIFF
Image Resolution
• 3 Megapixel images will print clearly an 8 x 10 photo
• 3 Megapixel image is about 1 Megabyte
• For screen/ web projects use lower resolution
• 1 Megapixel image is about 150 Kilobytes
Resolution100%
200% 3200%
400 %
800%
If you increase size of decrease resolution, you will get pixelization.
Resolution Needs
Use• Web page / Email• On-Screen• Ink - Jet• 3 x 5 snapshots• Photo quality
Enlargements
PPI• 72• 72• 125• 300• 600
What is PPI
• Pixels Per Inch (PPI) relates to the Dots per Inch(DPI) that the printer can print
• To determine PPI, divide the pixels by the inches. 17 inch monitor is usually 11x13”. A 1200 x 1600 image (1.2MB at 3 Megapixels) would be 1200/11 - thus 109 ppi
Onscreen Resolution
• Onscreen is only 72 ppi so a 15” screen (9x12) only needs
• (72x9) by (72x12)• 648 by 864• Or 559 872 … Just
over 1/2 a megapixel
• We can’t set cameras for onscreen projects to low resolution.
• If printing a full 8 x 10 photo, then could use 3 megapixel mode.
File Types
• JPEG - Joint Photographic Experts Group. Stores files compressed - loses some information
• TIFF - Tagged Image File Format• RAW - stores the actual numbers for
each pixel - 100% quality - increased file sizes - must be converted to be viewed
Kevin’s Pick
• 3 Megapixel
• Secure Digital Memory
• 2 x 512 MB Storage(extra cost)
• USB / Firewire transfer
• 10X Optical Zoom
• Around $300
Sample Websites
• http://reviews.cnet.com/Digital_cameras/4520-7603_7-5023995-7.html?tag=dir
• Kodak Support– http://www.kodak.com/eknec/PageQuerier.jhtml?
pq-path=2/3/38&pq-locale=en_US
• Digital Camera Comparisons– http://www.mycamera.com/index_digcompare.cfm
References
• Cnet
• Pics4Learning.com
• Wikipedia.org