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
MP-E65mm f/2.8 1-5x Extreme Macro Lens | Canon Australia
Canon MP-E 65mm f/2.8 Lens for macro work
Canon MP-E 65mm f/2.8 1–5x Macro | Fotobazar.sk
The $399 Laowa 25mm Macro Lens vs the $1,050 Canon MP-E 65mm | PetaPixel