Lightroom export: Size of small files

Evening,

I recently started using Lightroom after years of using Photoshop. One thing that I find difficult to understand, export.

After editing just one portrait as my first practice in Lightroom, I saved the file as 100% quality and JPEG. This resulted in a tiny 872 kb file size. Confused, I have reproduced the simple in Photoshop, saved as a full quality JPEG editing process and this resulted in a file size of 9 MB.

Side by side, expanded, I see no difference in quality. I noticed that the recorded image Lightroom has 240 dpi and Photoshop image 72 dpi.

Then, I went back to Lightroom and saved the same image as. TIF, resulting in a file size of 107 MB with no visible improvement in quality.

Lightroom is known for tiny file sizes? I'm doing something wrong? I do not understand why, how and what is happening with the sizes of export and file in Lightroom. I'd like an explanation.

Looks like you have checked resize it to fit, or checked the limit of the file size to... in the Lightroom export dialog.

Other than that, the file size is not a good indicator of the quality of the image - pixel dimensions are.

PPI is also devoid of meaning and irrelevant unless you want to print the image. PPI is metadata used by printer drivers to calculate the physical dimensions of the impression.

TIFF files are much larger than the jpg file size because they are uncompressed or use lossless compression, which is much less efficient than the jpg (lossy) compression. TIFF files can also be 16 - bit, which are twice the size of 8-bit files.

Take a look at

What is a digital image?

File formats

Basics of Lightroom

Tags: Photoshop Lightroom

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