https://www.edmundoptics.co.uk/p/11-with-50mm-and-50mm-efl-achromats-15mm-achromatic-pair/12114/
1:1 with 50mm and 50mm EFL Achromats, 15mm Achromatic Pair
TECHSPEC Mounted Achromatic Lens Pairs used in optics and photonics applications are available at Edmund Optics.
eflachromatsachromaticpair