Anything with mould in it
Before and after shots of the food at life size taken with a phone camera and the result after being photographed through the microscope with fancy lights and focus stacking.
I execute the set-up with an objective microscope lens mounted to my 35 mm camera. With the microscopic lens (15 x magnification), the depth of field is only about 5 microns (5 thousandths of a millimetre), less than the thickness of a human hair. To be able to get a photo with everything in focus, I use a technique called focus stacking. I shoot a series of images with the focus changed manually between each shot while painting with light to capture as much detail as I can. For some photos, I take up to 150 individual images and “stack” them in post-production to create a composite picture of all of the in-focus parts of each image.