Venidice ST-1 LCD Display Magnifier Viewfinder with Flip-Up Eyepiece for 3.0"/ 3.2" Screen DSLR Canon 500D 550D 600D 650D 700D 60D 70D 5D MarkII 5D MarkIII 6D 7D 7D2 Nikon D90

Cheaply made. Might work for a while, but not a professional quality device.won't work with the Nikon battery grip for the d600, and probably won't work with any battery grip.

Piece of junk...the glass inside was just rattling around, the little screws to get to it are junk, they strip out.Does not deserve a single star rating, but had to click one to submit.

The attachment screws that came with it are all plastic, and the one to attach the metal plate is not long enough to stay on the plate. the unit flips open but the clamp that is meant to keep it open or closed is flimsy and not tight. last, the edges of this viewfinder where it opens are wavy compared to the other side which is flush. It looks like a mouse nibbled some of the plastic away. This item is on it's way back... You really do get what you pay for.

Bad quality product, blur on edges. Don't recomended it

Edges are kind of curved, which distorts the picture. But for $30 I can look past it.