The $399 Laowa 25mm Macro Lens vs the $1,050 Canon MP-E 65mm | PetaPixel
Amazon.com : Canon MP-E 65mm f/2.8 1-5X Macro Lens for Canon SLR Cameras : Camera Lenses : Electronics
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
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Canon discontinues one of the best Macro lenses ever!