Sadly not found the Ricoh XR-7 / Sigma SA-1 / Sears KS-2 camera(s) on the site. They could be produced by Cosina as well, but I have no information about this.
For an explanation of the penta mirror, please see the page "Some Definitions".My definition of PP SLR also include the penta mirror cameras.
More about Pentaflex: Probably a penta mirror, which is a lighter, less expensive, a bit darker and simpler edition of the penta prism. Text will be corrected.
Hi, Information about this camera is scarce and often differing. What is your source? Anyway, thanks for your help. Does anyone else have information about it?