There is probably no other genre where light is at more of a premium than astrophotography, where ultra-wide apertures, high ISOs, and specialized equipment are the name of the game. This fascinating video shows what two professional astrophotographers were able to accomplish when limited to a very slow kit lens for their work.
Coming to you from Astro Backyard, this great video follows two photographers as they shoot the night sky using a Canon EF 75-300mm f/4-5.6 III USM lens. The 75-300mm f/4-5.6 is anything but a fast lens and not especially sharp either, and in a genre where the aperture of choice is usually f/1.4 or something similar, it presents some real difficulties for both photographers. However, despite the already narrow maximum aperture, you will see they stop the lens down a bit further a bit to compensate for its softness. Of course, they use German equatorial mounts, which compensate for the Earth's rotation by rotating the camera and lens in a plane with an axis to that of the Earth's to allow for longer exposures, but with such a slow aperture, it is still a significant challenge. Check out the video above to see how they did!