When Elwood meets Turner, Ross begins to switch between their vantage points, widening the film’s emotional aperture in the process.

I currently still have an aperture, which means a tear above my cords.

Fractions of a second count and he can change apertures and focuses with a flick of his finger without taking his eyes from his quarry.

Pushing the aperture or the F-stop down as low as possible allows the most light in, and he suggests setting the ISO as high as possible without adding grain to the image.

To reduce the overall system size, the researchers used small telescopes with an optical aperture of 47 mm as the receiving optics.