Hello.
I am saving my jpegs at a bit depth of 24.
Why would I want the Tiff file format over PNG, however, when Tiff is three times the size?
Also, why would I want to save at a bit depth of below 24--and, concerning this, where in Photoshop can I change this option? Native Photoshop "saves" of Tiff files appear to be 24 bits.
Thank you for all your input!
Michael
As previous poster said, 24 bit depth is 8 bits per channel. 16 bit per channel would be 48 bit depth
Why Tiff instead of PNG? Because PNG is not fully supported by Adobe applications and other digital imaging software.
Lightroom does not handle PNG. Photoshop (at least up to version CS3) will let you save PNG, but it will flatten your file, so you cannot save a multilayered or multichannel file.
The only drawback of tiff is file size, but as storage space becomes cheaper, is not a big deal
The increased time it takes to store a PNG is due to the extra processing it requires.
To change from 8 bits to 16 bits (per channel) or viceversa, in Photoshop go to Image> Mode> 8bits (or 16 bits).
A final note, quality can be reduced but not increased. If you start with a 8bit JPeg, you gain nothing converting to 16bit Tiff. It is only when you start with a Raw file or a 16 bit Tiff that it makes sense to stay 16bit tiff