Monocular with outline in viewfinder
I'm trying to find good places to take pictures at the local race track and I'm considering buying a monocular what is maybe 2x-16x. That way I can hike around and find places without twenty pounds of equipment hung off of me.
Icing on the cake would be if there was a "35mm" outline super imposed on the image. By "35mm outline" I mean a 2 by 3 rectangle.
Has anyone seen such a creature? Or maybe can someone suggest how to create this outline myself from a stock monocular?
Thank you in advance,