Yongnuo YN685 Speedlite Review

Yongnuo YN685 Review

Yongnuo YN685 speedlite front side view
Yongnuo YN685 Speedlite


Introduced September 2015, the YN685 speedlite is Yongnuo’s first speedlite with an integrated YN622C compatible radio receiver allowing it to act as an ETTL radio slave flash. However it doesn’t work as a radio master. You’ll also need to buy a YN622C-TX controller for your camera. It also supports radio slave modes for the RF-603 radio system (manual power control only).

Guide Price: £109 / US$115

Amazon (UK) / B&H Photo (US) / Adorama (US) / Amazon (US)


The Yongnuo YN685 has a built-in 622C receiver but in order for it to function as a radio controlled slace unit you’ll need to buy a Yongnuo 622C-TX transmitter to place on your camera’s hotshot. This will allow full transfer of Canon’s E-TTL II metering information. This wireless radio signal is not the same as Canon’s RT system so are not directly compatible with the 600EX II-RT or 430 III-RT speedlites. However the Yongnuo YN685 does have Canon’s EX optical wireless system allowing it to operate as a master or slave. This speedlite also has an inbuilt RF603 receiver and can be triggered by a RF-603 / RF-603 II / RF-605 / YN560-TX or YN560 IV acting as a controller (manual power only, does not support ETTL)

Various enlarged views of the flashgun showing the pull-out bounce card, battery compartment and metal foot


Maximum Guide Number 60m @ 200mm & ISO 100
Comparative Guide Number 36m @ 35mm & ISO 100

View showing tilting and swivel head

Zoom Head

Zoom head: Yes
Focal length coverage: Auto, 20-200mm
Coverage with flip-down diffuser: 14mm
Auto zoom for sensor size: Yes
Flash bounce card: Yes

Flash Head Tilt & Swivel

Up: 45, 60, 75 and 90°
Down: 7° (for subjects 0.5 to 2m away)
Left: 60, 75, 90, 120, 150 and 180°
Right: 60, 75, 90, 120, 150 and 180°

Yongnuo YN685 front view

Manual Exposure

Manual / output settings: Yes – 1/1- 1/128
Manual steps: 1/3 stop intervals

ETTL Exposure

Canon ETTL II with flash exposure compensation (FEC), flash exposure lock (FE lock) and flash exposure bracketing (FEB) 

Wireless Communication

Radio Wireless (RF) 2.4GHz
In-built YN622C (TTL) receiver and RF-603/603 II (manual) Receiver
Transmitter maximum range approximately: up to 100m
No. of groups: 6 (A, B, C, D, E & F)
No. of channels: 7 channels
Master/Slave: Can only operate as a slave unit (with the Yongnuo 622C transmitter fixed on the camera hotshot acting as a master)

Optical Wireless
No optical wireless communication system

Auto-Focus (AF) Assist 

AF-assist beam: Yes
Number of AF points supported: 1 to ? (info not provided)
AF-assist beam type: Infra-red
Beam range: 0.6-10m at centre, 0.6 to 5m at periphery

Contents includes speedlite, soft pouch, mini stand and manual

Other Features

High speed sync (HSS): Yes
Second-curtain flash sync: Yes
Modelling flash: Yes (fired with camera’s depth-of-field preview button)
Multi (stroboscopic) flash: Yes
Colour temperature info communication: Yes
Remote shutter release: No
Custom function: 15
Flash settings from camera menus (with compatible cameras only): Yes
Optical slave capability (S1, S2): No
Overheat protection: Yes
PC terminal: Yes
USB port for firmware updates:

Batteries & Recycling Time

Battery: 4 x AA batteries (alkaline or rechargeable Ni-MH. Lithium not recommended)
Recycling time: Approx. 0.1 to 3.0 sec
Number of flashes (approx): 100-1500 with AA alkaline batteries
Flash duration: 1/200 – 1/20000 sec
Flash Colour Temperature: 5600K
External power supply: Yes, supports the use of an external power supply

Build Quality

Dust and water resistance: No
Mounting foot material: Metal, with locking lever
Size: 67 x 77 x 210mm (extended state)
Weight: 426g (excluding batteries)

Compatible accessories: 

Yongnuo 622C-TX transmitter required to use the speedlite off-camera.

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This page was last checked and updated on 19 September 2020