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I use compressed for the simple reasons that on the RIV, uncompressed kills the FPS to 7 in burst mode, and the file sizes on uncompressed are huge, and you really can't see a difference unless you blow up to advertising board sized and pixel peep.
Yes, the A7R3 and A7R4 do not have lossless. The A7R5 does.I would use lossless no problem, but for some reason Darktable still doesn't recognize it. Irritating as hell, it's been 2 years since the A7 IV was intorduced. I can use it in Affinity, but when I'm batch-processing an event, I need Darktable.
My RIII doesn't have Lossless. I have shot Compressed Lossy and can't tell the difference.
Easier to remember: Anything FF from the A1/A7 IV and newer.Yes, the A7R3 and A7R4 do not have lossless. The A7R5 does.
It’s basically: Old CPU = no lossless option, new CPU = lossless
I have, sort of anyway, as you say, it can never be 100%. I honestly can't see a difference. As mentioned earlier, I think if you blew it up to massive size and looked on a high res screen, then maybe, just maybe it would show, but also, given how good modern sharpening software is, it will be harder still. There is no loss of detail IMO, and once opened the file sizes are identical.I was pontificating, only today, to a friend, about lossless means lossless, data compression science is several generations old, and there would be no reason for it to be wrong.
But there is a caveat. Of course, one has to trust the developer and their employer.
Well, cynic that I am, I am willing to trust Sony's lossless compression. And if it is not 110% perfect, I doubt that I'd ever notice. That is the end of the story, in practice, for me. I use it and will do.
But I'm just curious... Did anyone (Independent) ever do rigorous objective testing? I don't even know if that is possible, as two photos, even in a controlled setup, are unlikely to be identical anyway. Internally, Sony could take the uncompressed data and compress/uncompress it.
darktable 4.4.2: I'm using a7iv Lossless-Large.I would use lossless no problem, but for some reason Darktable still doesn't recognize it.
Lossy, by definition, indeed it can't. Something is lost.it can never be 100%
This also applies to DXo PhotoLab. sRAW and mRAW are not considered true raw files. Darktable is probably thinking the same way.darktable 4.4.2: I'm using a7iv Lossless-Large.
This was my test results:
uncompressed: OK
compressed: OK
Lossless Large: OK
Lossless Medium: no
Lossless Small: no.
Sorry - I may have confused you - the A6700 dies not have UNCOMPRESSED - they removed that option, leaving lossless compressed in its place.Easier to remember: Anything FF from the A1/A7 IV and newer.
Very surprised the 6700 doesn't have it. Maybe that's one way they're keeping it apart from the R V.
darktable 4.4.2: I'm using a7iv Lossless-Large.
This was my test results:
uncompressed: OK
compressed: OK
Lossless Large: OK
Lossless Medium: no
Lossless Small: no.
Lossy, by definition, indeed it can't. Something is lost.
I'm prepared to believe that, just as with higher-bit-rate audio, the developers are geniuses that have written and implemented algorithms that throw away stuff we really can't see/hear. I'm also prepared to believe that some people, sometimes, actually can.
@Tinopener, Sorry of this is a thread hijack. At least we are still talking about raw.