Sandman
In article <8vdu1ahaa6qgefm8k4q8pjd51oe8pftbjj@4ax.com>, Eric Stevens wrote:

Eric Stevens
But it's not the same as the file you would - say - send to a printer.

Sandman
It could be, sure. It's an ordinary JPG, and most printer drivers can handle them just fine. Again, you don't know what you're talking about.

Eric Stevens
I would send my best file to the printer, not a highly reduced JPG.

Sandman
They're not highly reduced, Eric. You are confused.

Eric Stevens
I have looked at the actual file sizes. I *know* they are reduced.

Sandman
They're not reduced. You are looking at standard previews of images you haven't worked with, since you're not a LR user. As I've said many times, every single image you're working with has a 1:1 preview.

Eric Stevens
You actually have several times said variations of "every single image you have worked with" - past tense. That's why I selected examples from a part of my catalogue that I have not touched.

Sandman
Yes, so you haven't worked with them, and thus they don't have 1:1 previews, what's so confusing with that?

Eric Stevens
I catalogued a number of files in LR but have not worked on them.

Sandman
That's what I just said.

Eric Stevens
Now you are telling me that LR prepares previews of reduced size/quality, presumably in the expectation that that this is what I will want.

Sandman
I don't know why this is so hard for you to understand.

Upon import, LR will create standard previews to the preffered size of all images it imports. Default size is 1440.

When you open any of these in the develop module (i.e. work with it) LR creates a 1:1 preview, that's why opening it in the develop module can take a second if you have a high resolution camera.

Even if you're in the library module and zoom in to 100% on a photo, LR will render a 1:1 preview.

If you just import photos and don't do anything with them, no 1:1 previews need to be made, but the discussion is about sharpening, and other image processing tasks, which are done in the develop module, and once you've opened the image in that module, i.e. working with it, there exists a 1:1 preview.

Only if the original file is a low-res highly compressed JPG, which of course it could be.

And TIFF's aren't "expanded" or "resampled". They're - like the preview's - a 1:1 copy of the original file, the difference being that TIFF can support a higher bit depth.

Again, you know nothing about these matters. You would do best to just sit quiet.

Why didn't you?

Eric Stevens
I wanted to help you exercise your feeling of superiority.

Sandman
YOu do that with every single post, Eric. You're clueless, everyone here is superior to you.