12-20-2018 12:04 PM
Once I have completed retouching, I save two versions of each image - CR2 and tif.
What would I lose, if anything in saving Jpeg 2000 lossless instead of the tif files.
The jpeg 2000 are sooooo much smaller.
12-20-2018 01:54 PM
You lose whatever information that the JPEG feels is not observable.
I used to have a program - It might have been ImageFX for the Amiga! - that would compress the file under varying levels of JPEG quality and report the bit-to-bit difference to the original on a graph.
12-20-2018 02:00 PM
Jpeg 2000 (jp2) unlike jpg, loses no image pixel info at all. It is a lossless compression (just as zip is for other file types).
I too had the Amga graphics program. Nice to know we are not all dead. Wonderful days to be computing.
12-21-2018 10:38 AM
The best and probably to most used by pros is an unaltered cr2 and a LR or ACR version with edits associated. I.E. a cr2 with its xmp tag and/or LR with its catalog. While I was working full time I stored photos in three places. Now that I have retired but still doing some work I only store them in two places.
Personally I rarely ever, to never, use or used tiff or any jpg version for long term saving in mind.