A newly leaked image of what may very well be the retail box of the Galaxy S9 reveals some interesting info about the flagship's camera. In line with previous rumors that the Galaxy S9 and S9+ may be capable of recording slow motion video at 1000fps, similarly to the Xperia XZ Premium, the back of the box suggests that the feature will be branded as "Super Slow-mo."
But alright, ultra slow-mo video recording, we've already seen that. What makes the S9's camera so special? Well, this would be the variable aperture. As noted on the box, the Samsung Galaxy S9's main camera will be able to switch from f/1.5 down to f/2.4, depending on the scenario. This is actually very important for recording high frame rate videos, since the camera shutter needs to operate at an extremely high speed, which results in less light captured by the sensor. This makes shooting slow-mo videos in darker environments an exercise in frustration, especially when it comes to smartphone cameras. Of course, shooting in the standard for many smartphone cameras slow motion modes—which vary between 120fps and 240fps depending on resolution—is not nearly the same as shooting at 1000fps. This sort of frame rate necessitates a much, much higher shutter speed, which in turn requires a lot more light to actually capture a good video. This is why having the wider aperture is so important – it lets more light in.