Merge to panorama in photoshop increases size by 100x

by greenberet123   Last Updated June 11, 2019 22:18 PM

When I merge 5 photos which are 5 MB JPGs into a panorama by choosing "Merge to panorama in photoshop" from Lightroom, and save the resulting image as a .TIF, the file size becomes 650MB! Then, when I flatten layers and save again, it reduces to 111 MB.

Why does this happen? Is photoshop creating new information? How can I save it in a format that doesn't lose any pixels, but also doesn't increase in size? The max size should be no more than 5 * 5 = 25Mb, right? Because photoshop cuts out the images in the right pattern and stitches them together?

Related Questions

LR Edit in PS, edited image does not show in LR

Updated July 27, 2015 17:07 PM