Related terms:
ef
af
fd
usm
eos
slr
dslr
zoom
lens
macro
nikon
canon fd
lenses
speedlite
ef lenses
metering
canon eos
mark iii
olympus
focusing
autofocus
lens mount
slr cameras
ultrasonic
ef lens mount
field of view
focal length
reflex camera
ultrasonic motor
maximum aperture
Wikipedia sources:
Canon EF lens mount
Canon EOS
Canon EF 50mm lens
Lens hood
List of Canon products
Fisheye lens
Canon EOS 50D
Lenses for SLR and DSLR cameras
Context for words:
canon
ef
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