Final Cut Camera adds variable aperture to iPhone 18 Pro

Apple shipped Final Cut Camera 2.4 on 29 September, a free update that hands the professional filming app variable aperture support on the iPhone 18 Pro — the first iPhone with a lens iris that can actually open and close. The same release adds professional video scopes, clean SDI output and genlock offset once iOS 27 arrives, which reads less like a camera app update and more like Apple assembling a broadcast rig out of a phone.

Apple calls the iPhone 18 Pro's Fusion Main camera the most advanced it has ever made, and on that model Final Cut Camera can now drive the aperture directly. Shooters can dial in an f-stop by hand or hand the decision over to shutter priority or aperture priority modes and let the camera work the exposure out for itself.

What version 2.4 actually changes

The rest of the update is a rebuild of the interface. Shutter angle, ISO and white balance sit closer to hand, and the overlays are now customisable, including false colour and clipping indicators for judging exposure at a glance. Focus peaking gains sensitivity control, a tally light tells everyone on set when the camera is rolling, and a two-finger tap clears the viewfinder so you can look at the shot rather than the furniture around it.

Cinematic mode effects also stop being trapped inside Cinematic mode. Ordinary footage, ProRes and Apple Log included, can now take the same focus and depth-of-field treatment, with focus points and depth of field adjustable after the fact on the Final Cut Pro timeline on a Mac.

Why aperture control is a bigger deal than it sounds

Most phones make do with a fixed aperture and fake the blur afterwards in software. A real iris changes how much light reaches the sensor and how shallow the focus falls, which is the difference between footage that looks like it came off a phone and footage that looks like somebody framed, lit and shot it on purpose.

It also forces a decision phones have never had to make: hold the shutter at a cinematic 180 degrees and let the iris move, or lock the iris and let the shutter chase the light. Camera departments argue about that trade-off for a living. Now hobbyists get to as well, on the timeline they already own.

The boring tools that matter most

iOS 27 brings the features that will actually sell this to working crews. Final Cut Camera picks up an RGB Parade, which shows the red, green and blue channels separately so you can check colour balance and exposure channel by channel, plus a histogram for the usual overview.

Clean SDI out lets an HDMI-to-SDI converter carry a signal with no interface burned into it, which is the version a broadcast chain can use. Genlock offset compensates for artefacts picked up when filming a display, and for the latency gap between the iPhone and the other genlocked cameras on a multi-camera shoot.

Our opinion

The marketing line — the most advanced camera Apple has ever made — is the least interesting thing in this announcement. What matters is the direction of travel. Scopes, clean SDI out and genlock offset are not tools you build for someone filming their dog in the park. They are the plumbing a multi-camera broadcast leans on, and putting them on a phone is Apple arguing, fairly loudly, that the iPhone deserves a seat in the truck.

Plenty of that promise is still theoretical. Variable aperture is one model's party trick, the broadcast features need iOS 27 and a converter nobody has bought yet, and no broadcaster is ditching a proper rig because a free app learned about f-stops. For European shooters, though, the arithmetic is quietly tempting: the app costs nothing, the phone is already in your pocket, and refreshingly little of this leans on the AI features Apple has taken the scenic route to European users with before. If you have been renting time on somebody else's camera for pickup shots, this is the update that makes that look silly.