16-bit grayscale from URL?

I am using new ImagePlus(url).show().  Will this
display a 16-bit greyscale file with 16-bit values
in ImageJ, or will it convert to 8-bit?  I plan to use
the PNG file format.  We are using ImageMagick
to convert to PNG, so if ImageMagick converts to
8-bit grayscale, let me know that as well.

I don't really want to go through the trouble of reading
the PNG into a short array--I'd rather that ImageJ just
do the right thing when it parses the PNG file.  We
had problems with passing Java 16-bit grayscale
Image objects to ImageJ, so I'm wondering if there
is an issue here as well.

I am using version 1.28.

My users like to see the 16 bit values, hence we don't
want to convert to 8 bit.  We are using a 12-bit camera
to capture the images.  We used to use 8-bit cameras,
so we have mixed data now.

So far, I am seeing 8-bit, but I'm not sure what part of the
application has 16-bit.  We are attempting to get
an image we know is 16-bit to try this experiment on.

Obviously, this is a little premature, but I thought I'd
ask.

John