What does 400mm equivalent mean in practical terms?

The phone's native 85mm lens combined with the 400mm equivalent teleconverter enables extreme reach photography — birds, wildlife, sports, and distant architectural details — at a quality level no smartphone camera achieves without an external lens attachment.

Are X200 Ultra lenses compatible with X300 Ultra?

The X300 Pro shares the same mount as the X200 Ultra, making those lenses interchangeable. The X300 Ultra's compatibility with older lenses hasn't been explicitly confirmed — the new 400mm is a generation-exclusive addition.

Why does the video cage need an active cooling fan?

The active cooling fan sits directly over the phone — critical during extended 4K recording sessions where sustained heat buildup can trigger thermal throttling. External active cooling extends continuous high-quality recording time significantly.

What does native 10-bit Log recording mean for video quality?

10-bit Log support across all three cameras captures a much wider dynamic range than standard video modes, giving editors far greater flexibility in post-production color grading to achieve a cinematic look without clipped highlights or crushed shadows.

Does this accessory ecosystem compete with professional cameras?

Not entirely — but it closes the gap more than any previous smartphone setup. The combination of a 400mm teleconverter lens, native 10-bit Log across three cameras, and the expandable SmallRig video cage, paired with the telephoto's 3-degree OIS confirmed earlier, creates a genuinely portable professional-grade imaging system that surpasses anything previously possible on a smartphone.

Hands-on Experience: vivo X300 Ultra Accessories — ZEISS 400mm Lens, SmallRig Cage for Professional Video, and 10-bit Log

vivo X300 Ultra Professional Accessories Hands-On: 400mm ZEISS Teleconverter, New 200mm Lens, and SmallRig Video Cage

vivo is launching the X300 Ultra with a complete professional accessory ecosystem built in partnership with ZEISS and SmallRig, comprising two kits: the Professional Photographer Kit and the Pro Video Rig Kit.

Professional Photographer Kit

The 400mm Teleconverter — The Zoomiest Smartphone Accessory Yet

The X300 Ultra introduces a 400mm equivalent teleconverter lens in collaboration with ZEISS — the longest focal reach of any smartphone photography accessory to date.

For context, the X200 Ultra came with a 200mm equivalent teleconverter that attaches over its native 85mm lens. The X300 Pro received an updated version using the same mount — meaning those lenses are interchangeable between the two phones.

Surprisingly Compact

The 400mm lens is only slightly longer than the old 200mm but significantly wider — not twice the size as one might expect. The new 200mm is much smaller than its predecessor and balances better on the phone.

The 400mm setup makes the rig noticeably front-heavy — a known challenge in telephoto photography and why professional telephoto lenses have dedicated tripod collars. How the photography kit case handles that weight load remains to be tested.

Upgraded Camera Grip

The new grip adds an extra function button and a flash button on top of the existing video record button, scroll wheel, zoom lever, and shutter button from the X300 Pro version.

Pro Video Rig Kit — Built with SmallRig

A cage that places the phone at center, equipped with two side handles each featuring a Bluetooth-controllable shutter button and zoom lever for stable two-handed filming.

The cage is expandable via multiple cold shoe mounts and quick-release ports — supporting an adjustable LED light on top, an active cooling fan positioned directly over the phone, and additional accessories such as external SSDs, microphones, and monitors.

Video Capabilities of the X300 Ultra Itself

The X300 Ultra supports native 10-bit Log across all three cameras — a professional-grade feature rare even in dedicated cameras at this price range.

vivo brands its video output "4K Master Color Video" — optimized for smooth tonal roll-off and film-like texture, avoiding the over-sharpened, digital-looking processing common in smartphone video.

The pro video app can focus directionally on subject audio. External microphone connectivity has not yet been confirmed.

The Main Camera Sensor

The 35mm main camera on the X300 Ultra uses a 1/1.12-inch 200MP sensor — a significant step up from the 1/1.28-inch 50MP shooter on the X200 Ultra.