Back to the Year 2000, the first Pentax DSLR EI-2000 was created and marketed. A more detailed and accurate specs of the camera can be found here (DPR's one is not very accurate, e.g., the pixel count and aspect ratio are wrong).In fact, there were a lot of breakthroughs and unique design features that can be found in the EI-2000, which include a semi-transparent fixed (half-)mirror (aka the
