Chinon Angle Finder iso_250 8 IS USM is a

8 IS USM is a very compact full-frame wide angle lens with a fast f2

If you want in on the festivities

But it still takes a pretty nice picture

" but it'll fit anything with a standard 1/4" thread

Compact and easy to use

Chinon Angle Finder iso_250 8 IS USM is aThe 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.