- Launched: October 2007
- Type: Digital SLR
- Sensor size: Four Thirds, 17.3 x 13mm
- Resolution: 10 megapixels
- Lenses: Four Thirds
- Key features: Articulating LCD, Dual card slots
- Links: Press release, Product page
Summary: Olympus's previous professional Four Thirds format SLR, now superseded by the E-5.
- Launched: July 2007
- Type: Digital SLR
- Sensor size: Full frame, 36 x 24mm
- Resolution: 21 megapixels
- Lenses: Canon EF (not EF-S)
- Key features: None
- Links: Press release | Product page
Summary: Canon's top-of-the-range professional full-frame SLR, long rumoured to be due for a major update.
