In the kit:
ARRI Ultra Primes provide exceptional image quality in a small, lightweight reliable housing. They are extremely sharp, high-contrast lenses, and they are very resistant to flaring and ghosts. They also have very smooth bokeh, especially wide open.
The lens are all T1.9 (f1.7), and the housings all have 95mm fonts, and matching placement for focus and iris gears. For projects where you need a sharp, clean look, and a small reliable housing, there are few better choices than Ultra Primes.