In a previous post, I wrote about the advantages of using jeweler's loupes in the 20-40X range to identify species when anatomical structure cannot been determined with the naked eye. Since then, I always have taken along my 20X and 30X lenses to view the microstructure of colonial ascidians, bryozoans, red algae, and small crustaceans. One of the disadvantages of the jeweler's loupe is that, although they are terrific for identifying and recording, they do not provide satisfactory in-focus images for documentation.
Olloclip Macro Lens for iPhone X: Fisheye + Macro 15x Lens
Review of the Olloclip 4-in-1 Wide-Angle/Macro Lens: https://9to5mac.com/2014/12/22/review-olloclip-4-in-1-lens-for-iphone-6/.
Olloclip Macro Lens Introduced: Macro 3-in-1 lens.
Helpful Monitoring Accessories: Jeweler's Loupe for Specimen Identification.
Tunicarium: Microscopic images of Botrylloides violaceus.