Richter Optica Plan Achromat Objective Lenses Specifications Part # Magnification N.A. UX-4P 4x Plan Achromat 0.10 UX-10P 10x Plan Achromat 0.25 UX-40P 40x Plan Achromat 0.65 UX-100P 100x Plan Achromat (Oil) 1.25 Richter Optica plan achromat objective lenses have 160mm tube length.
