GGS folding screen magnifier video DSLR 3x 3.0 inch (4: 3) 3x LCD Viewfinder Loupe Compatible Cameras: Canon 7D, 5D Mark II, 1D Mark IV, T2i / 550D T1i / 450D, 60D, G9, G10, S90 ; Nikon D700, D300s, D300, D90, D7000, D3100, D3000; Panasonic DMC-GF1, 2, LX3,5; Pentax K-7; any DSLR with 3 "LCD Screen (Electronics)
I use this particular Viewfinder for DSLR films with the 5dmk2 and MagicLantern in daylight or sunlight or strictly speaking, almost always, when it comes to the matter film. Finally really sharp questions and recognize all of the settings just fine.