Visualized images by Fiji

ctrl1.tif (1.8 MB) ctrl2.tif (1.8 MB)
Hi all,
I want to open with Fiji/ImageJ my images in tiff format in order to do image analysis. Images were acquired using the light microscope. I see some images good (ex. ctrl1), instead others images are completely black (ex.ctrl2) (as attachaments). Is it possible to do something? I tried to change the image format and also the bit number, but this did not work.
Thank you.

Hello Rita -

ctrl.tif appears to be, in fact, entirely black. I’ve opened in it a
number of image viewers (not just fiji), as well as a binary editor,
and all I see are pixels with the 8-bit value of zero.

Thanks, mm