digital photography - university of utah | university of utah
TRANSCRIPT
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Digital Photography
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Digital Photography
University of UtahStudent Computing Labs
Macintosh [email protected]
www.macos.utah.edu
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• Features to look for in a digital camera
• Camera accessories
• Basic tips for taking good photos
We Will Cover
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• Non-digital (SLR) or DV cameras
• Advanced photographic techniques
• Advanced photo touchup techniques
We Will NOT Cover
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Features to look for in a digital camera
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• Resolution• at least 3 - 5 Megapixels for good results
• new consumer cameras up to 7 MP - pro up to 14 +
• the more megapixels the better the image quality
Features to look for
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• Lens quality & features - zoom• at least 4x - 6x Optical zoom
• Digital zoom is BAD
• number of steps between wide and tight
Features to look for
Full frame Optical zoom Digital zoom
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• Lens quality & features - expansion
• barrel must be threaded for add-on lenses/filters
Features to look for
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• Image formats
• Most use JPEG with different quality levels - standard, fine, etc. (compressed, lossy)
• Many can also save as TIFF (compressed, lossless)
• Prosumer and Pro cameras can also do RAW (lossless, unprocessed)
Features to look for
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• Movie clips
• Most still cameras can now take low- to mid-quality video clips (MPEG and QuickTime .mov)
• 320x240px, 16 fps, with audio
• 640x480px, 30 fps, with audio (60 seconds)
• Some feature timelapse ability as well
Features to look for
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• Body & design
• Avoid cheap plastic bodies
• Metal tripod mount, NOT plastic
• Tripod mount position
Features to look for
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• Size & weight
• Small size usually sacrifices features
Features to look for
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• LCD Quality & features
• Avoid cheap LCDs
• Try it out in bright light
• Some can move and rotate
Features to look for
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• Viewfinder• optical or electronic
• optical is not exactly what your lens sees
• electronic will also display status and info icons
Features to look for
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• Camera display & menus
• Learn what each symbol means
• Make sure menus are intuitive and easy to navigate with controls on back of camera
Features to look for
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• Storage
• depends on your desired image size & quantity
• Memory Stick
• CompactFlash
• MicroDrive
• etc...
Features to look for
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• Flash
• Most cameras have built-in flash
• Others just have a “hot shoe” or “cold shoe”
Features to look for
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• Special features
• Manual shutter options
• Burst mode
• Audio/video recording
• Image effects
• Camera Speed
• Avoid slow startup & image processing times
Features to look for
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• Inputs and Outputs & port covers
• Audio/video out, power, USB
• Quality & durability of port covers
• Avoid cheap rubber “snap” covers
Features to look for
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• Data transfer
• Transfer from camera to computer
• USB 1 & 2
• FireWire (iLink, IEEE 1394)
• Media readers another option...
• Power
• In-camera rechargable cartridge is easiest
• AA/AAA batteries are a pain
Features to look for
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• Read reviews!
• Bad decisions can be avoided by checking out others’ opinions.
• Great digital camera review site:
• www.dpreview.com
• Incredibly detailed professional reviews
• Amazon.com is useful too
• Sort comments by lowest rating
• Epinions.com
Features to look for
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• Go handle one before you buy it!
Features to look for
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Taking good photos
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Taking good photos
• Use your “photographic eye”
• Don’t just point and shoot
• Compose your image first
• Try a few different angles
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Taking good photos
• Watch edges of frame for no-no’s
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Taking good photos
• Auto-Everything
• Most cameras auto-detect focus, flash, exposure, and aperture settings.
• Results will be undesirable in certain lighting conditions.
• Be prepared to stop and make adjustments.
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• Shutter speed
• Changes the amount of time the shutter stays open
• Ranges from 30s to 1/1000s +
• Slow speeds in low light will result in grainy photos
• Some cameras feature noise reduction for speeds slower than 1/25s
Taking good photos
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• Aperture (f-stop)
• Adjusts the amount of light let in & depth of field
• Older and low-end digital cameras aren’t adjustable
Taking good photos
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• Depth of field
• Affected by size of aperture
• Large aperture (f/2.4) has shallow DOF
Taking good photos
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• ISO (100, 200, 400, 800, 1000, etc)
• Changes light sensitivity
• Faster ISO good for action shots, poor for low light
• The higher the ISO the grainier the image
Taking good photos
ISO 100 ISO 800
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• Focus
• Usually set to infinity (everything in focus)
• Camera looks for sharp edges to focus on
• Not always ideal - some cameras get confused
• Avoid cameras with slow auto-focus ability
• Practice switching to manual focus and making adjustments
Taking good photos
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• Exposure Value
• Most cameras let you make small adjustments: +/- 2.0 EV (exposure value)
Taking good photos
Auto (0 EV) +2.0 EV -2.0 EV
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• Flash adjustment• Usually set to auto-detect
• Be aware of the lighting in your frame, turn flash on/off when needed
Taking good photos
Auto Flash off
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• White balance
• Most cameras have a variety of presets
• Auto, Indoor, Sunny, Cloudy, Fluorescent, etc
Taking good photos
Auto Indoor Outdoor
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• Sharpness
• Most newer cameras have presets
• +/- 2 sharpness levels
• Samples...
Taking good photos
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Taking good photos
0 sharpness
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Taking good photos
+2 sharpness
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• Practice makes perfect (or at least better)
• Get to know where all of these settings are and the effect they will have on your photos
• Practice quickly switching settings
Taking good photos
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• Web — www.macos.utah.edu
• Email — [email protected]
• Offices — Multimedia Center (Room 1705), ask at the service counter for someone from the “Mac Group.”
Contact Information
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Questions and Answers
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