Want to convert my grayscale image to a layer mask
Hi! I have a gray scale image that I want to turn into a layer mask. Here it is:
And this is the result I get...a very muted low contrast mask. I want the mask to have the same value range as the original image. How do I do that?

How I did it was I created an adjustment layer...then Image -> Apply image and did several different options including selectinig mask and not and it comes out muddy every time. Any help would be greatly appreciated.
Thanks!
