These are suppose to be used with a special aluminized curved screen that came with it, otherwise it is not very bright at all on a white wall or screen, we sold these in the 80's, 2 models one with a beta player and the other model with just video in and I thought a tuner built in, sony had high end viewfinders for their Broadcast cameras based off of this design, ( a very expensive option for outdoor shooting ), very cool to play with and of course if focus is not set correctly you will get only a green picture. have fun with it!!
