Google| Subject | Re: Lenses and sharpening |
| From | Sandman |
| Date | 09/20/2014 12:59 (09/20/2014 12:59) |
| Message-ID | <slrnm1qo0h.hiv.mr@irc.sandman.net> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | nospam |
| Followups | Eric Stevens (11h & 40m) > Sandman |
In article <190920142351460562%nospam@nospam.invalid>, nospam wrote:
nospamSandmanEric Stevens
Depends on how you export it. If you export it as a low-res highly compressed JPG, it can use the preview file. Chances are that it doesn't, but it certainly could, since the preview file *is* the current pixel data of the image.
So what happens when you want a high quality TIFF of the same size as the original file? Do you expand by resampling your low-res highly compressed JPG?
questions like this mean you don't understand how it works.
it *always* uses the original data. the cached previews are a speed optimization for the user interface.Well, yeah. Every photo you look at in Lightroom is data from a preview file. Lightroom creates three preview files for every single photo in its catalog.
1. Thumbnail - used in grid views 2. Standard preview - created if your monitor is smaller than 2048 pixels wide, used in all other modules, except the develop module and loupe 3. 1:1 - used in all modules if you have a large monitor, always used in the develop module and in the loupe.
Every single time you're looking at an image in Lightroom, you're looking at a preview file. Which of course makes perfect sense, since you can't actually look at RAW data on your screen.
-- Sandman[.net]
09/13/2014-
