Chinon Angle Finder brand_Slik The Nikon Speedlight SB-22 is

The Nikon Speedlight SB-22 is a compact flash that can be used with full TTL automation with compatible Nikon AF film cameras

Compatible with Canon EF and EF-s lenses

you can't directly mount to your camera and expect useful results

Clean glass and smooth focus

but I'm not Canon

Chinon Angle Finder brand_Slik The Nikon Speedlight SB-22 isThe Chinon Angle Finder slip onto the viewfinder of compatible cameras and provides a rotating, focusable view of the groundglass. Ideal for copystand or precision macro work, this angle finder will fit most Chinon SLR cameras with rectangular viewfinders; may fit other cameras, but no guarantees (it's not quite right for a Pentax Spotmatic K1000 finder). In excellent condition, though the rubber eyecup is long gone. Includes box.