Subject | Re: Lenses and sharpening |
From | Eric Stevens |
Date | 09/21/2014 00:40 (09/21/2014 10:40) |
Message-ID | <nf0s1atcaf378uaaae50eu82aj0chbpk07@4ax.com> |
Client | |
Newsgroups | rec.photo.digital |
Follows | Sandman |
Followups | Sandman (11h & 42m) |
SandmanWhich I previously described as a simulacrum.
In article <190920142351460562%nospam@nospam.invalid>, nospam wrote:nospamDepends 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.Eric Stevens
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.Sandman
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.Of course you can. But it won't look like an image. --