one major way that DSLRs are different from consumer “point and shoot” cameras.
- prime lens: only one focal length
- zoom lenses: variable focal lengths
- prime lens: only one focal length
- zoom lenses: variable focal lengths
- kit lens: a basic lens that comes with a camera body in a “kit,” usually not too expensive
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- Digital Single Lens Reflex”
- Digital cameras that resemble 35mm film cameras
- Mirror system inside lets you preview through the viewfinder the same image that is being captured on film/sensor
- These focal lengths listed are just rough ranges, and actual uses may vary; for example, many people use telephoto lenses when shooting distant landscapes to compress perspective.
- AF (autofocus) vs. MF (manual focus)
- zoom vs. focus – don’t get them confused
- how to properly focus a zoom lens
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Metaphors to understand how exposure is determined:
- window
- garden hose
- tanning
- International Organization for Standards – number that describes film’s sensitivity to light
- Now used to describe sensitivity of digital sensors in digital cameras
- HIGH ISO value means the sensor will be MORE sensitive to light, meaning it will take LESS LIGHT to get the right exposure
- hoose the correct ISO for your shooting situation
- more available light = lower ISO
- less available light = higher ISO
- BUT use the lowest ISO you can to avoid grain/noise
- shutter speed: how long the shutter is open
- on the Canon T6i ranges from
30” (seconds) to 1/4000 of a second - choose shutter speed based on situation:
- higher speed to capture fast action
- but what is the tradeoff?
- shutter speed: how long the shutter is open
- on the Canon T6i ranges from
30” (seconds) to 1/4000 of a second -
The 180-degree Shutter Speed rule:
- The shutter in a camera is half a circle (180 degrees)
- So, your shutter speed should be double
your frame rate
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why use them for still photography?
- camera shake: occurs with a shutter speed slower than 1/ [focal length] of a second