Review on Opteka Professional Directors Viewfinder Multicoated by Chris Hazzard

If you need something less expensive this is a solid option. It's a good price and works well, but there are some quirks to be aware of. 1) The image you see in the viewfinder seems accurate, but it is VERY small and far away. 2) There is no diopter adjustment. So if you wear glasses, you still need them. 3) You must USE THE PEN to carefully mark the focal length dial to calibrate it to your sensor size; It has markings for 35mm, Super16, etc., but they're approximate (and don't account for crop factor) so you might have multiple markings for normal settings. So if you line up the focal length, it's accurate. 4) The textured rubber grip slips a little sometimes; it had to be cemented; You can add a few drops of super glue to attach it.