When opening an original shot raw file it opens in CS6 almost 5 times as large

Why is the file so large when I have not made any changes?
1..is there any thing that can reset to keep the original file size?
I am using CS6 and Lightroom 4

Why does it bother you that file sizes change depending on the format?
[email protected] wrote:
I am looking at the file size in the left corner. If I do a save. My raw file as shot with a d800 is 34 MB now saving it as a tif and using LZW it is 176 MB. The files are all 16 bit and I am shooting in 12 bit from the camera .
A raw file with 12 bits per pixel is certainly going to be smaller than one with 48 bits per pixel (which is what a 16 bit RGB file really is).  As has been mentioned various formats do various kinds of compression which may be more or less effective depending on image content..
Bottom line is this:  You have a D800.  It makes large images that can be incredibly detailed.  You'll have to learn to live with the fact that these images are going to take a LOT more computer resources than the cameras of the past.
-Noel

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