Problems with image .fits format

Questions
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1

Whenever I try to open an gray image .fits format, even though a 16-bit image, the image displayed always appears in gray scale pixel intensity variation between 0 and 1.
I would like to know if it is possible to somehow open the same image .fits format in order to be displayed with the original intensity variation of 16 bits.
I have used the following commands:

Import[ "Image.fits", ImageSize -> Large,"BitDepth" -> 16]

Thanks for any help

Antonio

2

For FITS, I always refer to my comment cell:
(* !! Export[] “Data”, Import “RawData” !! *)

Then you can dispense with the ImageSize and BitDepth options. You’ll get an array of Integers (IIRC), which if you care to, can be N[]'ed to give Real numbers.

3

Frank,
This is already a promising start…

Thanks a lot

Antonio