claim: Vatican City was established in the 1920s.
evidence: The history of the single-lens reflex camera -LRB- SLR -RRB- begins with the use of a reflex mirror in a camera obscura described in 1676 , but it took a long time for the design to succeed for photographic cameras  : the first patent was granted in 1861 , and the first cameras were produced in 1884 but while elegantly simple in concept , they were very complex in practice .. single-lens reflex camera. single-lens reflex camera. camera obscura. camera obscura. One by one these complexities were overcome as optical and mechanical technology advanced , and in the 1960s the SLR camera became the preferred design for many high-end camera formats .. The advent of digital point-and-shoot cameras in 1990s through the 2010s with LCD viewfinder displays reduced the appeal of the SLR for the low end of the market .. The mirrorless interchangeable-lens camera is increasingly challenging the mid price range market .. mirrorless interchangeable-lens camera. mirrorless interchangeable-lens camera. But the SLR remains the camera design of choice for most professional and ambitious amateur photographers .