I have an expert telling me that ACR does not use all of the data within a CR2 file when rendering it into Photoshop. I opened a CR2 file with both ACR and Canon's software (DPP4) and immediately saved into TIFF. The PS file was 35 meg and the DPP4 file was 185 meg. Another friend suggested that this difference was caused by the PS file being in 8 bit and the DPP4 file was 16 bit. Can anyone confirm/refute that ACR uses all of the data within the CR2 file when rendering? Is there any historical validity in the statement?
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