R
- Radial mask
- Radiance
- RAID drive
- Rangefinder camera
- RAW converter
- RAW files explained
- RAW+JPEG
- RAW processing in camera
- RAW vs JPEG
- Read speed
- Rear curtain flash
- Recycle time
- Red eye
- Red filter
- Referenced files
- Reference View (Lightroom Classic)
- Reflector
- Release Priority mode
- Remote
- Reproduction ratio
- Resampling
- Reset (camera)
- Resizing
- Resolution
- Revoring
- RF mount (Canon)
- RF-S lenses (Canon)
- RGB
- Rig (video)
- Rolling shutter
- Round filters
- Round tripping
- Rule of thirds
- Run and gun (video)