Laowa 100mm f/2.8 2X Ultra Macro APO Lens EF Mount

Followed by the success of the Laowa 60mm f/2.8 2:1 Macro, the 100mm f/2.8 2:1 Macro is the 2. It features an apochromatic (APO) characteristic that chromatic aberration at both ‘in-focus’ & ‘out-of-focus’ is both invisible.

eBay