Which brings us to the Sigma DP-1, the subject of this report. For the first time we have a shirt-pocket sized digicam using a roughly APS-C sized sensor. This is approximately the size used in popular DSLRs such as the Canon 40D and Nikon D300, and slightly larger than the 4/3 format used by Olympus and others in their DSLRs.
To make the comparison a bit easier to visualize let’s compare the diagonals of these formats. The Ricoh GR2 and Canon G9 (and similar digicams) have sensors with about a 10mm diagonal. On the other hand a 4/3 format DSLR, like those from Olympus, has a 22.5mm diagonal. A typical Nikon or Canon or Pentax DSLR with a roughly APS-C sized sensor has a diagonal measurement of about 28mm. Godzilla was right – size does matter.
Check it out here.