Originally posted by nanhi I have seen one of these Mirror Right Angle Finders like new in a local shop for $6. These are used in Telescopes, and has a (1) inch dia tube. If I glue a viewfinder adapter, can I use it on my K-5? Flimsy plastic Chinese made Right Angle Finders cost $40 or more. This stuff is all metal and well built. I have attached a photo. Thanks in advance.
Sorry, but you cannot. You see, camera right angle finders are in fact small telescopes focused at infinity. The telecope adapter you show is just a plane mirror or a prism. Thus, what you may see with that is merely your camera viewfinder at some distance.