A rather battered but classic 1930's German LEICA analogue 35mm film camera with an Elmar ƒ4 , 9cm (90mm) telephoto lens and an extra hot-shoe mounted viewfinder Stock Photo - Alamy
Attachable viewfinders - not only for Leica cameras
Ricoh Viewfinder GV-1 for Ricoh GR Camera 21/28mm Finder | Camera Centre UK
Sony RX1 Hands-On Review
Do You Need an Eye Level Viewfinder? | Sans Mirror | Thom Hogan
A DIY Inexpensive Optical Viewfinder for Compact Digital cameras with a hot shoe. - YouTube
Sony Electronic Viewfinder for Cyber-shot RX1 (FDA-EV1MK) Review - Review 2013 - PCMag UK
Attachable viewfinders - not only for Leica cameras
KEKS Viewfinder
External Optical Side Axis Viewfinder Part for Ricoh GR Leica X Camera | eBay
Digital Electronic Viewfinder for nikon Canon SONY Fuji pentax Olympus Camera DV Focus Lens Hot shoe Easy Tracking Sporting Aim - AliExpress
A rather battered but classic 1930's German LEICA analogue 35mm film camera with an Elmar ƒ4 , 9cm (90mm) telephoto lens and an extra hot-shoe mounted viewfinder Stock Photo - Alamy