Sony A7s In Action: Slow-Motion at 120fps

Slowly, but surely, Sony A7s is turning into one of the “go-to” 4K camera for the indie filmmaker, not only for its insane low-light capabilities and Full-frame size sensor, but also for its slow-motion capabilities as well.

The camera can record 120 frames per second in 720p HD continuously. Today we have a couple of examples of slow-motion from the A7s used by cinematographers in innovative and creative ways to get some astounding results.

The first video is produced by infrediblemedia. It was shot at 120fps on the Sony a7S with Zeiss FE 55mm f/1.8 at the Biltmore Hotel in Miami, FL.

Fourth of July – Fireworks in Slow Motion – Shot on the Sony a7S from infrediblemedia on Vimeo.

The second video is produced by Andrew Reid from EOS HD. It is a short, experimental film that shows the real artistic potential this camera has.

Nomad from Andrew Reid on Vimeo.

This is what Andrew shares from his perspective while shooting “Nomad”:

The Sony A7S continues to amaze me with the creative opportunities it is allowing for during a shoot. Clean at ISO 3200 in S-LOG most of the shots here were so softly lit for effect that I frequently needed to shoot at ISO 12,800 just to get an exposure.

Exposing S-LOG is still tricky, I am leaning more and more towards over exposure with it and applying the correct exposure with my grade. In that sense it is a bit like raw.

Getting clean usable footage at ISO 12,800 – now that is a new thing. There’s not many cameras that can claim great slow-mo with the low light sensitivity of a 12MP full frame sensor. Certainly not accessibly priced ones! If you want a good scare, check out the price of a Phantom Flex!

Light sources were only a candle, iPhone torch and an old industrial German desk lamp with red filter on the front.

Compared to GH4 in slow motion mode A7s produces cleaner images with less noise due to the superior low-light capabilities of the full frame sensor. However, while shooting 120fps in 720p the camera automatically switches to Super 35mm crop mode. But still, even in 720p the footage from A7s is similar to 96fps 1080p slow-mo of GH4 in terms of resolving details and sharpness.

However, one of the downsides of A7s Andrew points is the disability to play the slow motion in-camera, which possibly could be resolved in a future firmware update. For now, if you want to see the footage in slow-mo you should conform it in your NLE first.

Whether in normal speed or in slow-motion, I’m sure we’ll continue to see more and more great footage produced by filmmakers using the A7s. If you already have some slow-motion footage and would like to share those with us, please post your links in the comments section below.

[via and infrediblemedia Vimeo channel]

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