Aerial Recon Lens on 5Dmkii - 7 inch (178mm) f/2.5 Kodak Aero-Ektar lens removed from a K-24 aerial recon camera. Custom focusing helicoid and extension tube. Have to upgrade the focusing mechanism to have a longer throw. Heavy, next to impossible to focus, D-R-E-A-M-Y. Has a massive image circle covering 5x5. More images soon.