Nikon Z9's Advanced Dual-Stream viewfinder technology explained

Nikon EVF
(Image credit: Nikon)

Nikon has released a video explaining the technology behind its clever Dual-Stream electronic viewfinder seen in the new flagship Nikon Z9 mirrorless camera, exploiting powerful Expeed 7 image-processing engine.

The 37-second long video explains using a diagram that Dual-Stream Technology works by processing live view data and recording still image data separately, and in parallel. This makes the Real-Live Viewfinder possible by delivering the still image directly to the SD card and the live view data to our irises via the LCD monitor. 

 Read more: Nikon Z9 review (opens in new tab)

Conventional viewfinders tend to show frames with a loss of view that can sometimes skip and repeat, but the Real-Live Viewfinder is designed to enables users to smoothly follow every movement of their subject. This will ensure that you don't, in reference to Henri Cartier-Bresson, miss your decisive moment when shooting. 

Delivering a smooth view that reveals every single moment, including those previously missed by conventional electronic viewfinder systems or blocked by DSLR mirror movement, can determine the difference between a good shot or an exceptional one. Especially taking into account that the Nikon Z9 (opens in new tab) boasts an extraordinary 120 frames per second continuous shooting speed!

• Read more: Canon EOS R3 vs Nikon Z9

Watch video: Nikon Z9 Dual-Stream EVF explained

The new high-performance Expeed 7 engine provides up to 10 times faster processing speeds. This enables real-time split-second action to be captured simultaneously and as it happens through the blackout-free Real-Live Viewfinder, meaning there's no delay between what is seen and what is captured.

We were blown away by the features of Nikon's new flagship, in particular its 8K functions (opens in new tab) – it is able to record over two hours of 8K 30p video without overheating, and following a firmware update in 2022 will be capable of 8K 60p capture. 

The Nikon Z9 is available for preorder now, setting you back a competitive $5,496.95 / £5,299 / AU$8,999.95 with extremely limited stock. Retailers are expected to ship out the product on 15 December.

Pre-order the Nikon Z9 at Adorama (US) (opens in new tab) 
Pre-order the Nikon Z9 at B&H (US) (opens in new tab)
Pre-order the Nikon Z9 at Park (UK)
(opens in new tab)Pre-order the Nikon Z9 at Wex (UK)
(opens in new tab)Pre-order the Nikon Z9 at Ted's Camera (AU) (opens in new tab)

Read more:

Best Nikon camera (opens in new tab)
Nikon Z9 vs Sony A1 (opens in new tab)
Best Nikon lenses
(opens in new tab)Best Nikon Z lenses (opens in new tab)
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(opens in new tab)Best Nikon Black Friday deals (opens in new tab)

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Beth Nicholls
Staff Writer

A staff writer for Digital Camera World, Beth has an extensive background in various elements of technology with five years of experience working as a tester and sales assistant for CeX. After completing a degree in Music Journalism, followed by obtaining a Master's degree in Photography awarded by the University of Brighton, she spends her time outside of DCW as a freelance photographer specialising in live music events and band press shots under the alias 'bethshootsbands'.