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
Canon MP-E 65mm F2.8 Review | Outdoorphoto Blog
Macro photography with the Canon MP-E 65mm
Canon MPE-65mm Sample Images August 2010: Canon SLR Lens Talk Forum: Digital Photography Review