Concave Easel by Ryan & Trevor Oakes

Twins Ryan & Trevor Oates have created this 3D machine titled Vision, which enables absolutely anyone to draw a perfectly accurate perspective drawing. The idea for the perspective device came about from studying Brunelleschi, who is renowned for creating linear perspective in the early 1400s. This inspired their product, Vision to allow one eye to look at the subject and the other to plot the drawing, in order to create a true representation of a space, as one is perceiving it there on site. 
Watch a short video on the work here.

Images: Ryan & Oakes