Chinon Angle Finder brand_Slik 5 is a good quality

5 is a good quality manual focus zoom lens for Pentax K mount cameras

Clean glass and smooth focus

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

but I'm not Canon

The Rolleiparkeil is a magnifying/parallax correction viewing lens for use with a Rolleinar taking lens (not included)

Chinon Angle Finder brand_Slik 5 is a good qualityThe 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.