Spell: Baron van Hook's Microcosmic Eye (5e version)

Baron Lee van Hook is still out there, studying microbes and performing other magical research.  So here's a version of his microcosmic eye spell for fifth edition.  It appears on the Wizard spell list.  (It probably also relies a bit more on DM fiat than normal 5e spells, but that's Rulings, Not Rules for you.)

Baron van Hook’s Microcosmic Eye
1st-level divination (ritual)
Casting Time: 1 action
Range: Self
Components: V, S, M (a small, finely-crafted lens worth at least 100 gp)
Duration: 1 hour
You can magnify objects by sight and will alone. While focusing on an object, you can “zoom in” to a magnification as high as one thousand times, the upper limit of modern light microscopy. As an added benefit, the spell automatically enhances contrast, replicating some of the utility of microbial staining.
While using Baron van Hook's microcosmic eye, you may gain advantage on certain Intelligence (Investigation) and Wisdom (Medicine) checks to diagnose diseases or investigate other microbial phenomena, as determined by the DM.