At its a6400 announcement event back in January, Sony also gathered press together for a presentation in which it aimed to debunk some of the things being said about its E mount in recent days. One of the interesting facts shared is that the E-mount supports a maximum aperture of f/0.63.
Nikon's new full-frame mirrorless Z lens mount is designed to be futureproof over the next 100 years and "redefine possibilities." How crazy are the possibilities? Get this: the Z-mount could theoretically accept lenses with apertures as large as f/0.65.
We've told you about some pretty fast lenses in the past -- from the legendary Zeiss 50mm f/0.7 lenses made for NASA and used by Stanley Kubrick to film a candle light scene, to X-Ray lenses that you can try to Frankenstein onto your camera body for some strange soft-focus results.
But what is the fastest lens that is theoretically possible? And what would that lens look like? Matt Granger answers those exact questions in the interesting technical video above.