Why are our raw files so big?
Posted: Mon Nov 05, 2012 10:48 am
Well I played around with the Adobe DNG software and the lossy compression I took a higher ISO NEF raw file and used lossy compression keeping the same resolution (the new software lets you limit the resolution say 15/10mp and other options)
File size went from around 14.5Mb down to 7.5Mb! Almost half..
I then played around pulling the image apart with big changes to exposure and other areas..and did not see any obvious differences in the image.
I'll have to see what it does to the other raw files I have, but I'm starting to think I could save quite a lot of space converting raw to DNG. Even not using the lossy compression it took the 14.5mb file to 12.4mb. (12 bit raw)
I won't do anything yet but I'm thinking that this might be the way to go with raw files from now on.
Not that I would downsize the 16mp Raw files..but if you halve the space taken up that's quite significant IMO
I'm not a natural DNG fan by the way but it struck me how inefficient the raw files from cameras are
Thoughts?
File size went from around 14.5Mb down to 7.5Mb! Almost half..
I then played around pulling the image apart with big changes to exposure and other areas..and did not see any obvious differences in the image.
I'll have to see what it does to the other raw files I have, but I'm starting to think I could save quite a lot of space converting raw to DNG. Even not using the lossy compression it took the 14.5mb file to 12.4mb. (12 bit raw)
I won't do anything yet but I'm thinking that this might be the way to go with raw files from now on.
Not that I would downsize the 16mp Raw files..but if you halve the space taken up that's quite significant IMO
I'm not a natural DNG fan by the way but it struck me how inefficient the raw files from cameras are
Thoughts?