Everflash 20
- Year: 1971
- Manufacturer: Keystone
- Origin: USA
- Film Format: 126 Instamatic
- Lens: Keystone 40mm f/5.6
- Lens Construction: 3 Elements/3 Groups
- Focus: Fixed
- Shutter Type: Leaf Shutter
- Shutter Speeds: ??
- Meter: CDS, Non-TTL
- Viewfinder: Optical w/ Brightlines
- Exposure Modes: Program
- Flash: Integral Electronic Flash
- Battery: 2x AA
- Dimensions: xxmm, cm3
- Weight: 301g