That contraption is called Universal Sports finder. http://www.butkus.org/chinon/mamiya/mamiya_rb67_pro-s/mamiya_rb67_pro_s.htm
Its shown mounted on the camera on page 51. You mount it on the camera, set it for the lens in use, and use it for correct image framing of action events.
Original manuals are available here also http://www.mamiyaleaf.com/documentation.html
There were 3 versions of this camera over the years, RB67, RB67 Pro S, RB67 Pro SD.
What you have there is a sports finder. It's used for shooting fast moving subjects like sports.
A warm welcome to A.P.U.G Art from the U.K, didn't you know that on the internet using all capital letters is regarded in the same way as shouting, and considered bad manners.Hi all. I am semi-skilled using my Nikon DSLR and decided that I wanted to see what film was all about. Being impulsive, I didn't go the easy route with some variety of "almost point and shoot" 35mm piece.
I located and bought a mint RB67. We are ok so far - I got past the hassle of figuring out why my shutter won't fire and all the safety features on the camera, and I learned how to remove and remount the lens.
My question: There is a standard waist level viewfinder mounted on the camera, and what looks like a brand new view finder that you look through at eye level, which has a pop-up glass plate on a precision type slide. The slide rails are graduated and marked with what appear to be the focal length of assorted lenses; 90mm, 127mm, 180mm, etc. So the question is what is this called, what does it do, and when and why would I want to use it?
I truly appreciate any assistance. I did try a google image search but could find nothing like it in a search for "RB67 viewfinders".
I have attached an image.
Thank you all
Art - FromNY
Thanks Alan i truly appreciate your reaching out to me and helping me out.
Art FromNY
What you have there is a sports finder. It's used for shooting fast moving subjects like sports.
I'm surprised such a thing exists. I can't imagine the RB being very good for sports photography. You'd need at least the motorized back to make it work.
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