Photoshop CS Raw Converter

[Juerg]

I have a specific question on using photoshop's raw converter for the S2 pro. As anybody knows, the camera is writing in raw format around 6.5 effective megapixels, which are interpolated towards around 12.1 mp using the set of 4256 x 2848. Now when opening such a file photoshop cs is actually proposing a default set of 3024 x 2048, thus going after the effective pixels of around 6.5 mp. Off course the user can go to the next higher level and using a set of 4256 x 2848 which produces a file with double the size than at the default value (around 70 MB instead of 35MB). Is there a disadvantage/advantage of using photoshop's default set of 3024 x 2048 instead of the set 4256 x 2848, which would match better the camera's (interpolated) capacities of pixels or is photoshop just ignoring this interpolation and regards only the effective pixels?
Juerg

[easternherp]

I believe that CS acts the same way as the Fuji converter in that it starts at the 3024x2048 as this doesn't involve any interpolation but CS can interpolate to a much larger size which Fuji can't, although the quality is lower at extreme interpolation.

[bjnicholls]

Because of the Fuji sensor's octagonal photosite array, there isn't a raster grid format for the raw data. That means every size has to be interpolated. That's how the 12 megapixel image files end up with approximately 9 megapixels worth of detail. So if you go with a 6 megapixel image from either the EX or CS converter, you're not getting quite the detail the raw file can deliver.