Advantages of tif, jpg etc.?

[Stan35mm]

I scanned some of my 35mm films at a professional place, and they sent me tif files (about 40MB size). These files yield about 10MB files when I save them as jpg.
What's the difference? I know jpeg is compressed, and tif not, but does it matter later on? Do I lose acual image data when saving as jpg?
Thanks.

[Jesper]

Do I lose acual image data when saving as jpg?Yes, you do. JPEG compression is lossy - i.e., it throws away some of the image information to make the file smaller.

TIFF files can also be compressed, but usually lossless compression is used (LZW or ZIP), so you won't loose any image data.

[DaveG]

I scanned some of my 35mm films at a professional place, and they sent me tif files (about 40MB size). These files yield about 10MB files when I save them as jpg.
What's the difference? I know jpeg is compressed, and tif not, but does it matter later on? Do I lose acual image data when saving as jpg?
Thanks.


If the jpeg is saved large then the reproduction is usually OK. But saving and resaving a jpeg loses more and more information. If I'm sending stuff to a magazine the last thing I do is convert a .psd file to a jpeg, so it's only been saved once in that format. Then I hope that they don't mess with it much.

Work only with tiffs or psd files. Use the jpegs for emailing.

[Stan35mm]

Thanks, I'll try keeping tiff whenever possible.
I use GIMP to process my pictures, and save as jpeg with 100% quality. I thought it would save without any loss of information, but better safe than sorry, so I'll avoid jpg.