paulrnzpn wrote:
I always shoot both.
JPEG files are only 8 bit.
RAW files contain lots more data and are (mostly, I think) 16bit.
Most of our modern cameras in 202x produce 14 bit raw files.
paulrnzpn wrote:
(The difference between 8bit and 16bit is huge.)
Sometimes JPEGs SOOC are good enough, and that's why I shoot both, but it depends of the intended purpose of the photo, and so I like to keep both options open to me for later on.
RAW files can be pushed a lot further in post processing than JPEGs can. When pushed too far, JPEG quality will start to break down - nasty JPEG artifacts begin to appear and so on. That can happen to RAW as well, but you can push RAW a lot further before it happens.
Also, sometimes you see that horrible 'banding' effect in JPEG sunset photos (for example). Well, that is because JPEG is only 8 bit, so it has far less data and far fewer colours. (RAW contains a lot more colors than JPEG files: 68 billion more colours, to be exact! A 12-bit RAW image contains thousands of shades of red, green, and blue, while a 14-bit RAW file contains trillions of possible colours.)
(The difference between 8bit and 16bit is huge.) b... (
show quote)
No. A raw file stores only red, green, and blue pixels. There's no yellow pixels or magenta pixels or teal pixels etc. -- just red, green and blue at a bit depth of 14 bits. That 16,384 possible values per each color times three colors (setting aside that there are typically twice as many green pixels as red & blue) for a grand total of 49,152 different colors. Whereas a single pixel in a JPEG has a combined 8 bit value for red, green and blue -- 3 times 8 = 24 bits and so each pixel in a JPEG can be any one of 16,777,216 colors.
When a raw file's CFA is intrepolated off (demosaiced) and the image is converted to an RGB image is when additional color becomes possible through assignment of red, green, and blue values to each pixel. Convert a raw file to RGB and save the result as a JPEG and you get 16,777,216 colors -- way more than enough. It's when we convert and save raw files as a larger bit depth RGB image for further processing (16 bit per pixel typically) that we get a huge number of potential color values but they are only that: potential. 99% of that potential you can't see or print. Saved in the ProPhoto color space as is common they may even contain colors beyond the range of human perception. The potential is there to give us working room to post process the image. When we're finished with post processing it's appropriate to save the final result as an 8 bit (24 bits per pixel) RGB image. That's more than print sufficient.
paulrnzpn wrote:
When I want high quality for printing, I always process from RAW and save as 16bit TIFF to take to the printers. No banding when I do that, and ALL of the colours are in my print.
There'd be no banding from an 8 bit file either if it was created properly.
paulrnzpn wrote:
Also, if you look at the EXIF data of both, you'll likely see that the dpi is different between the two. Two examples:
On my Canon 600D: RAW is 240dpi and JPEG is 72dpi.
On my Canon 5D Mk4: RAW is 350dpi and JPEG is 72dpi.
A stored DPI (PPI) value in EXIF data is meaningless. There are two images below each saved at 640x446 pixels. The EXIF data for one is 10PPI/DPI and for the other 300PPI/DPI -- meaningless as they are both 640x446 pixels.
paulrnzpn wrote:
If all you ever want is small prints (6x4") and to post JPEGs online, and only do a little bit of post processing, then JPEGs are usually perfectly fine.
However, if you want to produce really big very high quality fine art prints, or want to push a lot in post processing, or publish, etc, then RAW is the answer.