You can read more in this press release, but the highlights are:
- Same 24.6Mp full-frame capabilities as the top of the range A900, with slightly reduced fps and viewfinder coverage - and it's cheaper!
- Dual Bionz processors
Sony have also launched a new zoom lens, with constant f/2.8 aperture: the SAL2875 28-75mm F2.8 SAM lens
More details of the A550 and A500 can be found at this press release. They come with:
- 14.2/12.3Mp sensors respectivity, utilising Sony's new Exmor (TM) sensor technology
- A 3" tilt LCD
- In-built HDR (high dynamic range) processing - I think these are the first cameras to do this?