F (mount)

FA

F&R aspherical

FC

FE (focal clutch mechanism)

FE (Canon fisheye)

FEC

FHB

Fill factor

Fill-in flash

Firmware

First-curtain sync

Fisheye lens

Flare

Flash compensation

Flash gun

Flash memory

Floating system (lenses)

FLD

Flourite

Focal length

Focus lock

Formatting

Foveon system

Frame rate

FTM

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