The Schneider Optics 23-1098689 TOURMALINE 2.8/50mm TFL-mount lens is a 50mm 12 megapixel lens with a M30.5x0.5 filter size, and -0.1% distortion.

TOURMALINE 1.3" Lenses are available as C-mount or TFL-mount lenses. They feature a compact design, high resolution down to 2.4 µm pixel size, and are visibly corrected and broadband coated for use in the 400-1000nm (Visible through Near IR spectrum) range. The optical design with a low chief ray angle prevents shading and supports all generations of SONY Pregius sensors.