Canon T1i / 500D vs Nikon D5000 vs Olympus E-620 vs Panasonic G1 Noise Comparison at DPReview – The E-620 and Lumix DMC-G1 don't perform as well as the bigger-sensor cameras here, namely, the D5000 and EOS Rebel T1i / 500D / Kiss X3.
Olympus E-620 Reviews
Olympus E-620 vs Panasonic G1 RAW Image Quality Comparison at DPReview – The Panasonic Lumix DMC-G1 wins on detail captured.
Canon T1i / 500D vs Olympus E-620 RAW Image Quality Comparison at DPReview – The EOS Rebel T1i / 500D / Kiss X3 wins on detail captured.
Nikon D5000 vs Olympus E-620 RAW Image Quality Comparison at DPReview – The D5000 wins on detail captured.
Olympus E-620 dSLR /14-42mm Hands on Review and Sample Photos at Steve's Digicams – Steve issues the following verdict:
Olympus continues to offer high-quality features and abilities in their E-series models. While the E-620 is what we consider an advanced amateur model, it sports an entry-level price tag of about US$699 or less for the body/14-14mm Zuiko lens outfit. With excellent image quality both indoors and out, pleasing High ISO capabilities, and loads of easy to use features, we have no problem giving the Olympus E-620 dSLR a high recommendation.
There's also a gallery of full-resolution sample images with a nice variety of shots (taken with the Zuiko 14-42mm lens) for you to assess the image quality of the Evolt E620 with.
Canon EOS T1i / 500D vs Olympus E-620 vs Nikon D5000: Review, Sample Photos and Video Clips – This article at quesabesde.com is written in Spanish, so you might prefer to read Google's English translation of it.
The respective kit lens for each camera was used for the test: Canon EF-S 18-55mm IS VR on the T1i / 500D, Nikkor 18-55mm AF-S VR on the D5000, and Zuiko 14-42mm on the E620.
Tons of full-resolution images await your analysis.