Pocket-Lint reviews the Olympus E-510 DSLR and writes:
The E-510, its similar-looking bigger brother boasts a 10-megapixel resolution, Live MOS sensor, Olympus’ excellent Supersonic Wave Reduction anti dust system and Live View with a 7x and 10x magnification for accurate manual focus when in Live View mode. …The increase in size means the camera is very nice to use and reassuring to hold, plus, the 510’s extra real estate allows the camera sling to be mounted so that it does not get in the way as on the E-410. …
Okay, if you own a Canon or Nikon system you’re already locked into that are unlikely to swap due to the cost of switching all those lenses if nothing else, but if you’re trading up from compacts, across from film or simply need a compact yet superbly specified DSLR with anti shake, than the E-510 must be placed near the top of your list.
More detail review about this camera Olympus E-510 DSLR