It's 21 years since we reviewed the Olympus E-1, arguably the only successful attempt to develop a digital SLR from first principles ... of the most significant cameras of the past 25 years.

Back in the late 1990s as the digital revolution ... 35mm film cameras. Imagine a film cartridge with attached sensor, the idea went, which you could just drop into your trusty SLR and continue ...

As the point-and-shoot and compact camera trend is setting back, older cameras from decades ago are now becoming far more ...