Originally posted by Plentax I do not understand. The questions of OP (original posting) are place in K-30 forum and about JPG. So RAW-DNG conversion is not required for K-30.
Sorry. I think I missed one word and caused confusion. What I meant to write about was "Lossy Compressed DNG". Not merely Copressed DNG.
If saving space was the issue, using RAW (PEF or DNG) is going to go a long ways towards doing just the opposite when compared to JPG!
Actually, Lossy compressed DNG is not going to save a lot of space either, as it is comparable to a standard JPEG.
But it is going to give a LOT better pictures for not a lot of disk space gain. (Lossy compressed DNG still retains the 12/14bit nature of the image)
I think the general consensus was merely that reducing the image size will in fact reduce quality, perhaps to an undesirable extent.
Rather than being concerned about file size or disk space, the image quality should com first.
I was simply giving a potential reasonable option for retaining much of the benefits of raw PEF/DNG without doubling or quadrupling
I have a K5, stillMP, but K-30 might have better compression? My file sizes are slightly larger. :-) Still, I see the following;
Standard JPG, about 8MB.
Standard DNG (from camera) about 22MB
Standard DNG from camera lossy compressed via LR4 is about 6-8MB.
- Disk space is cheap.
- Reducing image size in camera greatly affects image detail.
- In camera raw (PEF and DNG) are much larger than standard JPEG
- Lossy Compressed DNG (using LR or Adobe DNG converter) is going to save a lot of space over standard DNG/PEF.
- Lossy Compressed DNG will use roughly the same space as a standard JPG.
- Lossy Compressed DNG will have far superior quality with regards to editability than a standard JPG
- Lossy Compressed DNG will not have visual affect on the image. (although, yes it is lossy compression, so extreme processing can naturally be expected to show loss in tone and detail when compared to a normal raw DNG/PEF file)