The Canon MP-E 65mm 1-5x Macro Lens | Myrmecos Blog
Canon MP-E 65mm f/2.8 1–5x Macro - Wikipedia
MACRO photography with the Canon MP-E 65mm 1-5x macro lens - lens review - YouTube
Macro photography focusing rails for stacked focus, especially with Nikon macro lenses or Canon 65mm MP-E f2.8 macro lens with 5X enlargement | Digital Photography