Good used condition, see photos for specifics. Shows some signs of use.

Optics are in great condition, no damage, scratches, haze or fungus.

Diopter adjustment is nice and smooth.

Attaches to the any SLR eyepiece with a 21.5 to 22mm width. Seems to fit Olympus, Minolta and Pentax OK. But doesn't fit Canon. If you want me to test on a specific camera, let me know and I will try if I have one.

Provides a zoomed in view of the centre of the focus screen for use in critical focussing situations.