This is an adapter to increase the distance between the canon EOS M screen and a 60x45mm viewfinder. My viewfinder does not have diopter adjustment and I had increase the viewfinder distance to be able to see the screen focused. This distance will have to be adjusted for each individual but can easily be done in any 3d software. It can also be easily adjusted to other viewfinder sizes.

It uses the flash show mount and tripod screw (screw can be bought for pennies on ebay).