The three lenses with the Miranda I used briefly in 1967 were sharp, but the camera body soon developed several problems. In addition to decent lenses, Miranda offered two advantages; an attractive model in their ads and a three year guarantee. Honoring that guarantee on an inferior product may have hastened their demise. Back then Minolta was popular among the Japanese. Pentax made neat cameras. Nikon was the obvious choice for much technical photography with by far the best range of accessories. For example, I don't know of any other maker that produced a Polaroid back for a 35mm camera. Even the Nikkormat was a functional and durable camera, despite a few quirks. However, even Nikon occasionally erred: the Nikkorex, for example. The early Nikon FT finders gave accurate exposures, but made the camera a top-heavy monster in comparison to the svelte Pentax Spotmatic. That was the price Nikon paid for offering several waist-level and eye-level finders for one body. Many brands competed with Nikon for casual photography, but Nikon dominated the market for much specialized work.
Originally Posted by fotch