They are by Mamiya. You get what you pay for. My Nikon 8x loupé cost $260. That was 12 years ago. Some Schneider loupés are around $400 mark at the moment. No cheap bottle-top glass made in these babes. If you are examining trannies and negs, you want the highest quality viewing glass possible to cut out aberration, coma and astigmatism. You name the features, and generally the sky's the limit!