The T198059 from Teledyne FLIR Commercial Systems is a 2.9x close-up IR lens (50 µm) supplied with a case, for use with the A615, A645sc, A655sc, T600bx, T610, T620, T620bx, T630, T640, T640bx and T650sc.
The T198066 from Teledyne FLIR Commercial Systems is a specialized close-up IR lens with case, 1.5x magnification (25µm), for use with A615, A645sc, A655sc, T600bx, T610, T620, T620bx, T630, T640, T640bx and T650sc.