Introduction To Digital Photography I - Basics FRITZ SCHNEIDER PEACHAM CYBERNETICS
Photography is not new 15 th Century 19 th Century “Camera Obscura”. Tintypes, Daguerreotypes, etc. 20 th Century Film, paper, widespread use. 21 st Century Digital, electronic transmission.
Human Vision Focuses on part of scene Adjusts rapidly to light Continuously flits around Limited color range Color lost in low light
Basics of Photography Subject Lens Imaging surface Image storage Image retrieval ()
Film Photography vs. Digital Subject Lens Film Developing Darkroom magic? Printing Subject Lens Sensor Memory Card Postprocessing Printing or Display or e -Mail or…
How Photographs are used Film To make small prints to pass around To make large prints to display To make slides to be projected Digital To display on a screen To send as e-mail To share on the Internet To build web sites Occasionally to print out
Economic Differences Film Digital Initial cost Moderate Getting cheaper Taking pictures Must buy film and developing Free!! Take all you want! Image display Must pay for prints (even if blurry) or own a slide projector. Need a computer
Characteristics of a Digital Camera Lens quality Size: Cell Phone vs. Pocket vs. Long Zoom vs. SLR Memory type: Internal, SD, XD, Memory stick Resolution in megapixels Zoom range Stabilization User interface Battery life
How many Megapixels? On screen? 1024 x 768 =. 79 MP Finest printing is 300 dpi, the resolution limit of the unaided human eye. Picture Size At 150 dpi At 300 dpi 4 x 6 0. 54 MP 2. 16 MP 8 x 10 1. 8 MP 7. 2 MP More allows you to crop it and still have detail. Bigger pictures take longer to save and need a larger memory card.
Sources of Information Magazines (but they are often out of date) Friends experience (not opinion) Reviews www. dpreview. com Imaging Resources Ignore the salesman!
Basics of Photography Composition Focus Exposure
My Pet Peeve Here we are in …
Why are you taking the picture? To prove I was there To tell a story Because it’s beautiful
Composition: single subject Vs.
Composition: Rule of Thirds vs.
Composition: Lead the Eye
Composition: People add interest
Composition: Frame the subject
Focus: Depth of Field • Wider aperture (f/2. 8) has less depth of field • Telephoto has less depth of field
Exposure The camera has limited range. It does not see what you see. Washed out highlights Lost shadow detail
Exposure: Special Conditions Spot metering setting Fill flash Check White Balance Half-press the shutter release Reduce exposure for snow, sunrise, etc.
Battery Life If you have one, use the eye-level viewfinder as much as possible: the screen uses power Turn off flash, be aware of red-eye feature Carry a spare battery
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