I took one of the microscope objectives (the slightly damaged M Plan Mitutoyo—sharp, but has some pits and scratches on the front and back—out in the field for hand-held imaging, and that did NOT work out. The focus depth is just so tiny, probably on the order of a tenth of a mm or so.
So I brought some dried husks of plant matter home, including this never-budded flower off a dead weed. This is a great lens despite the defects. This was another focus stack, with 66 images. At 0.1mm per images in focus, that works out to about 6.6mm, which is in fact about the range I moved through when taking these.
The magnification (I don’t know the exact amount) is enough to give this a half-natural, half-microscope look depending on what part of the image you look at. We can’t see extremely small things unaided, and I get a kick out of what an extreme enlargement can reveal.