Thursday, April 8, 2010

Week 6

Hyperfocal distance
Lens focused at infinity d1 for any given aperture is known as H.P
Lose half of your d.o.f if lens is on infinity

Sensor array type- differences
CCD
-separate off sensor signal amplifies, often just one result in: less noise, more uniform output, slower to analyse and amplify signal
-more “photosites” in a given area
-uses more power
-more expensive to manufacture.

CMOS
-signal amplifier at each “photosite” results in- more noise, less uniform output, faster to analyse and amplify signal
- fewer “photosites” in a given area
-uses less power
less expensive to manufacture
advances have preferred sensor type

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