The exit pupil of the EOTech Vudu 3-9×32 SFP Ultra Short varies across the zoom range and directly affects how bright and easy-to-use the optic feels in different lighting conditions. At 3×, the scope delivers a large exit pupil of about 10.7 mm, providing a bright image and a very forgiving eye position—ideal for fast shooting or low-light environments. As magnification increases, the exit pupil naturally shrinks, and at 9× it measures about 3.6 mm, which is still usable but offers a narrower "eye box," requiring more precise head alignment. This 10.7–3.6 mm exit-pupil range is typical for compact 32 mm objective optics in this zoom class, giving the Vudu 3-9 a good balance of low-light capability at lower power and precision-focused usability at higher magnification.