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| p.150 #9 · Official: Sony A7 and A7R Fullframe Mirrorless |
Fred Miranda wrote:
I have seen differences from Sony's IDC and LR. Images processed in IDC can look very posterized on smooth transitions. I can't see that in LR using Adobe's standard profile.
My files also look sharper in IDC but it could be the level of sharpness applied by the different converters. Another possibility is that DRO, "Diffraction reduction" and "Detail reproduction technology" are present on RAW files converted with IDC only.
I just had a look and found that the smallest RAW I've produced is 36,667,392 bytes and my largest is 37,617,664. Since the raw pixel data is 36,152,320 bytes this means the additional data has been between about 0.5 and 1.5 megabytes. This is certainly way more than would be required even for copious metadata (for scale: War & Peace in plain text is about 3MB ), so there is something more interesting than shooting parameters being stored there. The variation also seems detail-dependent as my smallest RAWs were from expodisc testing for magenta rings with the FE35 and the next smallest after those was an image that was 90% bokeh while the largest was a frame almost entirely of in-focus foliage.
My initial suspicion on this additional data was that these are embedded thumbnails for quicker display in the camera. I've found that magnifying in image review is comically slow while simply flipping through images scaled to the screen is not, which would match the thumbnail theory. It could also be that this additional data is for the various image enhancements but I'm still skeptical of this possibility due to the small size of the additional data. It's certainly not impossible, but I can't imagine what useful side-data the BIONZ X could be producing that stores in less than half a bit per pixel. I could have missed it, but I also can't find a setting to toggle the detail/diffraction features nor any mention of them in the manual which leads me to believe that these are always-on features. Of course even if these are always-on it could still be the case that they simply don't apply to RAW.