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Nissin Japan Ltd., Tokyo
http://www.nissin-japan.com

Nissin Marketing Ltd., Hong Kong
http://www.nissindigital.com

BASIC OPERATION

WARNING

Fill-in reflector
Light diffusing panel 
Wireless flash sensor
Flash head
AF-assist light

Accessories:  Flash stand, Pouch

Pilot lamp (Test flash button)
On / Off switch (Press button)
Mode select button / indicator
 (TTL

Manual

Slave 1

Slave 2)

Flash power level indication lamps (6 LEDs)
Flash power level select button

Lock ring
Mounting foot
Hotshoe contacts
Battery magazine

Nomenclature

NOTE

Inserting batteries

Mounting Di466 Four Thirds on the Camera

Shooting Di466 Four Thirds automatically

Olympus cameras

Removing Di466 Four Thirds from the Camera

Turn on the flash unit

To save battery energy, the power is automatically turned off (to 

stand-by mode), both in TTL mode & Manual Power mode, in about 

2 minutes of idle use. 

While Di466 Four Thirds is in the stand-by mode a Pilot lamp 

blinks every 2 seconds showing the flash unit is in stand-by mode.

To turn on Di466 Four Thirds again, press the camera’s shutter 

button halfway or press any button of the flash unit. 

In case Di466 Four Thirds is not in use over 30 minutes, the unit is 

completely turned off and shut out the current leakage from the 

batteries. 

To turn on Di466 Four Thirds again, take the first step of turning the 

flash unit on.

In case of using Di466 Four Thirds as a slave flash (at slave 

mode*5), Di466 Four Thirds will not go into the stand-by mode.  It 

will however automatically turn off when not used over 60 minutes.

*5: Slave mode : Refer instruction below.

The flash unit contains high voltage electric parts.  Do not try to 

open or repair the flash unit.  Return it back to the repair service 

station or the store you bought it.

Do not touch the inside parts from the opening when the unit 

was dropped and broken.

Do not fire the flash direct to the eye at short distance.  It may 

damage the eye. When taking flash picture especially toward a 

baby, it is recommended to keep the flash unit at least 1 meter 

(3.3feet) away from the subject.

Or use diffuser or bounce the light to the ceiling or to the wall to 

soften its intensity.

Do not use the flash unit in the flammable gas, chemicals or 

such liquids.  It may cause fire or electric shock.

CAUTIONS

Do not leave or store the flash unit in the temperature over 

40°C, such like in the automobile.

The flash unit is not water resistance. Keep the unit away from 

rain, snow and humidity.

Do not use benzene, thinner or other alcoholic agents to clean 

the unit. 

Do not use this flash with the cameras which is not listed in this 

instruction manual, otherwise it may damage the camera’s 

circuitry.

Remove the batteries when not in use for a longer period of 

time.

Set the camera’s shooting mode, select focal length and take 

pictures with Di466 Four Thirds on your camera. 

Di466 Four Thirds is a supplement to help your taking a creative 

and live picture.  Almost all jobs are automatically done by the 

camera and you just control the camera only. 

Di466 Four Thirds has energy saving double power off function.

Nissin Di466 Four Thirds / Micro Four Thirds 
version has been developed for digital SLR and 
(Micro) Four Thirds system cameras with 
hotshoe and the latest TTL flash control 
technolgy.

Note: No film camera can be used with Di466 
Four Thirds.

Attach Di466 Four Thirds to your camera, and 
then almost all jobs are controlled by the 
camera for the most proper exposure.
Read this instruction manual and refer your 
camera owner’s manual to enjoy flash 
photography.

Flash stand

DIGITAL TTL POWER ZOOM FLASH

INSTRUCTION MANUAL

Remove the battery 

magazine and insert 4 x 

size AA batteries as shown 

in the picture.

The battery compartment is 

designed so that each cell 

is placed in same direction 

to avoid the confusion in 

poor light situation.

It is recommended to use all 4 batteries in same brand and type, 

and replace them all at the same time.  Wrong insertion of each 

cell does not make electric contact.

NOTE

Before mounting or removing Di466 Four Thirds into 

or from the camera, it is recommended to  turn off the 

power switch of both Di466 Four Thirds and the 

camera.

Set Di466 Four Thirds to the camera’s hotshoe and turn on the 

power switch.
Di466 Four Thirds is automatically set for the camera’s TTL 

mode when ready lamp lights up.
Press the shutter button of your camera halfway to focus the 

subject.

Take the picture. Di466 Four Thirds is fired and the result is 

immediately shown on the camera’s LCD display.
When you change the focal length, The power zoom flash 

head of Di466 Four Thirds responds without delay and 

immediately sets its position to match the lens focal length you 

selected.  

The flash illumination coverage of Di466 Four Thirds responds 

to the lens focal length of 12 mm to 53 mm.

In all camera's shooting mode listed above, Di466 Four Thirds will 

fully work in TTL automatic-flash system.

For a test flash, press the Pilot lamp.  When using the test flash 

as an open flash, please note that the reference guide number 

in this case is G.No.10 (ISO 100).
To turn off the flash unit manually, press the On / Off switch for 

2 seconds.

Panasonic cameras

[P](Program),  [   ](Full Auto), [A](Aperture priority), 
[S](Shutter priority) or [M](Manual);

Loosen the lock ring and slide the mounting foot of Di466 Four 

Thirds off the hotshoe of the camera. Make sure to turn the lock 

ring all the way to completely clear the lock pin off the hooking 

slot on the hotshoe.

Slide the mounting foot of 

Di466 Four Thirds into the 

hotshoe of camera.

Turn the lock ring to loosen 

it as shown in the picture.

Turn the lock ring to 

opposite direction and 

tighten it.

Lock pin comes out to hook 

the foot at the hotshoe for 

sure contact.

Press the On / Off switch 

and Pilot lamp turns red 

showing the unit is turned 

on. 
In a few seconds, the Pilot 

lamp turns green.  Di466 

Four Thirds is ready to 

shoot.

+ / - symbol is clearly 

marked at the battery 

compartment.

Place the battery magazine 

back into the body.

Shutter speed, aperture and flash mark (    ) are indicated in 

camera’s view finder.

[P](Program), [    ](Full Auto), [A](Aperture priority), 

[S](Shutter priority) or [M](Manual); 

Mode

Olympus Panasonic

Shutter

Speed

Aperture

Setting

Control on the

camera

[        ]

P ]

P ]

S ]

M ]

A ]

Automatic

Automatic

Manual

Automatic

Manual

Automatic

Automatic

Automatic

Manual

Manual

Automatic

Automatic

Guide No. at manual exposure mode (ISO 100 in meters/feet)

Install batteries to correct direction.

Come to Stand-by mode in 2 minutes, and
Power off in 30 minutes after the power on
or the last use of flash unit.

Zooming

Position

Flash Power Level

Usable

cameras
Guide No.
Illumination

coverage

Power

source
Battery life

Energy

Saving

Recycle time
Flash

Exposure

 Four Thirds and Micro Four Thirds system 

digital cameras

JOY OF FLASH PHTOGRAPHY

SPECIFICATIONS

Guide Number table

TROUBLE SHOOTING

Fill-in flash and Light diffusing panel

Bounce Lighting

If the subject is close (within 2 meters), 

turn the flash head 90 degrees 

upward and pull out the fill-in reflector 

as shown in the picture.
Take a picture as usual.  

A blink of fill-in flash freshens up the 

subject in natural image.

This small blink of flash is also useful 

when taking a picture of 

baby without scaring him.

This technology is also 

useful to eliminate the 

shadow on the subject 

under the tree.

When the flash unit is turned on, it is automatically set for TTL 

automatic flash mode.  In this mode, the mode select indicator 

does not light.

You can select the power, 

from the left to right, 

1/32 – 1/16 – 1/8 – 1/4 – 1/2 – 1/1 (Full) power.

Select your desired F-stop and /or shutter speed.  Point the 

subject and press the shutter.

Set the camera shooting mode to either [ A ] or [ M ].

The color of mode select 

indicator turns to Red as 

shown in the picture.

Press the mode select 

button.

For portrait photography, pull out the light diffusing panel and 

place it over the flash window as shown in the picture.  The 

diffusing panel makes the flash light soften and creates a lively 

color effect on the subject.

Since the light diffusing panel expands the lighting area, it 

covers the range of 9mm focal length lens.

Turn the flash head upwards.  It turns 

upward to 45 > 60 > 75 > 90 degrees.
When the flash head stays at turning or 

tilting position, the zoom setting position 

of Di466 is automatically set at the 

position for 25 mm(50mm / film 

camera standard) focal length lens.
The wall or ceiling in this case should be flat surface and white 

color is preferable. Colored ceiling or wall may reflect its color 

on the subject.

For short distance or portrait flash photography, we wish if the light 

is not too sharp or too strong to the subject.  Use fill-in reflector 

flash or diffuse the light.

TTL flash power compensation

TTL flash power compensation is provided in 7 steps by half Ev 

increment for –1.5,  –1.0, –0.5, 0, +0.5,  +1.0, and +1.5ev.

Set the Flash power level select button to the power level you 

desire.

When Di466 Four Thirds shows no level indication LED is 

turned, the flash power compensation level is at even(0Ev) level 

as default value.

Take a picture and the aimed subject is shown with required 

lighting effect by keeping the background exposure level as 

originally expected.

Press the flash power select button, by each press of + marked 

knob, it sets the power of +0.5 

 +1.0 

 +1.5Ev. and the - 

marked knob sets it to –0.5 

 –1.0 

 –1.5Ev.  The power 

level indication lamp shows the power level you set.

On some cameras, the TTL flash power compensation setting is 

provided in its menu mode.

When setting the TTL flash power compensation on your 

camera, the same of Di466 Four Thirds is, in this case, to be 

counted in addition to the compensation you selected in the 

camera’s menu mode.

With the latest TTL flash 

control system, the flash 

power level is always 

automatically controlled by 

the camera for the most 

appropriate exposure.  You 

wish if you can soften or 

weaken the flash light, or give 

more light to the subject 

without changing the environmental or background exposure effect 

Di466 Four Thirds can make it possible quickly for each shot at 

respective occasion of flash picture.

AF assist light emitter

Under the low light condition, in the dark place, AF assist light will 

automatically emit the beam and illuminate the subject, so that the 

camera can easily focus the subject in darkness. The beam is 

however not shown in the picture.

When taking a picture of a baby or small children, do not shoot 

the flash straight on to them.  Bounce the light off the ceiling or 

wall so that it won’t scare them. 

The lighting on a subject in front of the wall, creates an 

unnecessary sharp shadow on the wall resulting the picture 

disappointed.  Bounce the light off the ceiling or 

wall to soften the light on the subject, 

and the shadow fade out.

Flash mode setting

Di466 Four Thirds has a wireless remote flash system as a slave 

unit.

You can enjoy creative flash photography with multiple lightings 

from the various directions. 2 slave modes are provided, Slave 1 

(S1: color green) for digital pre-flash system and Slave 2 (S2: color 

blue) for analog flash system.

Slave 1

: In this mode, Di466 Four Thirds synchronize to the 

pre-flash system.  The master flash is to be set at TTL mode.

Slave 2

: In this mode, Di466 Four Thirds synchronize to the 

traditional single flash system. The master flash is to be set at 

manual mode.  Studio lighting system synchronizes to this mode.  

This mode is also available for open flash, and for a standard flash 

in the market.

To reset the flash unit to the other mode, press the mode select 

button for TTL and or Manual mode.

Energy saving system 

for stand-by mode will not 

work when it's in slave 

mode.

Automatic shut off function 

is however effect. It 

automatically turns-off 

when not in use over 60 

minutes.

WARANTEE :

In case of the following reason of the defect, it may void the 

warrantee. Please refer the respective warrantee condition for 

details which depend on the country by country.

1.The product is not used in accordance with the instruction of 

the owner's manual.

2.The product is repaired or modified by the one who is not an 

authorized repair service agent.

3.When the products is used with the cameras not applicable, 

lens, adaptors or such accessories produced by the third 

party.

4.Fault or defect caused by fire, earthquake, flood, public 

pollution and such natural accident.

5.In case that the product is stored in dust, moisture, extremely 

high temperature or such poor condition.

6.Scratch, blemish, crush or worn out by a violently use or 

treatment.
7.Guarantee card without name of place purchased or date of 

purchase stamped, or no guarantee card.

The zoom setting position is automatically set for the focal length of 

12mm while using Di466 Four Thirds as a slave unit.

Place the master flash on the camera and 

switch it on. Or set 

the camera for flash 

mode to always

fire the built-in

flash.

Wireless Remote Flash

TTL exposure level is accurately calibrated for standard balance in 

accordance with Nissin’s standard.  If any adjustment is however 

required, or if you like to set your preferable level, it can be 

adjusted for about ±0.75 (3/4)ev.

This adjustment can only be set when the flash is off.

Insert the battery magazine with 4 batteries fully loaded as 

instructed above.

Press the pilot lamp and 

On/Off switch both together 

and hold for 3 seconds.  

The mode select lamp turns 

purple showing the unit is ready 

for TTL exposure level 

adjustment.

Press the power level select 

button or - to adjust it 

to the required exposure level.  

Each LED shows 0.25(1/4)ev 

increments and it can be 

adjusted up to 

+0.75(3/4)ev.(over exposure 

efficiency), or down to 

-0.75(3/4)ev.(under exposure efficiency). Press the On/Off switch 

for 3 sec. to turn the unit off.  The adjusted level is memorized and 

kept as customized default TTL exposure level. This setting is 

permanently kept until you alter the setting to the other required 

level.

Start to use flash unit from “Turn on the flash unit” at “

BASIC 

OPERATION

” explained as above.

TTL Exposure level custom setting

In some occasion, or for special expression, you may need your 

own flash exposure instead of automatic controlled exposure. You 

can set Di466 Four Thirds for non-automatic flash mode, and 

select the desired flash power from 6 different levels.

Manual Exposure Flash

Following functions are available on Olmypus cameras. Refer to 

camera owner's manual for details.

The flash is controlled at a slow shutter speed to the 

correct exposure for both the main subject and back 

ground in low light conditions or at night.

For Olmypus only

Setting master flash:

Switch Di466 Four Thirds on and 

while the ready lamp is on, press the 

mode select button to select 

S1

(color 

turns 

Green

) or 

S2

(color turns 

Blue

). 

The mode select button turns to 

TTL(nolight)—Manual(red)—S1(green)

—S2(blue) and back to TTL.

Setting slave flash Di466 Four Thirds:

When flash is set to either slave 

mode, the first lamp of Flash power 

level indication lamps is lighten.  This 

lamp shows the 1/32 manual 

power level.  Press the Flash power

 level select button at to select different power of 1/16

1/8

1/4

1/2 and Full.  

Press the button at marked — to power downward. 

The power you selected is memorized and remains unchanged 

untill the unit is switched off.

Set slave flash at any place and direct the flash head as you 

desire. Slave sensor may not respond to the master flash in the 

extremely bright condition or under the poor sensing situation.

Use the flash stand included. Place Di466 Four Thirds on to the 

flash stand which can be placed either on the flat place or on 

the tripod by the screw. 

Set the camera for flash shooting mode.  Point the subject and 

shoot.

The slave flash will synchronize to the master flash and gives 

additional lighting from the different direction you desired.

Shooting the subject:

NOTE

Metal type accessory shoe is not recommended since it 

may give electric damage on the electrical contact of 

the flash hotshoe. 

Slow synchronization

In the red-eye reduction flash mode, a series of 

pre-flashes are emitted just before the regular flash 

fires. This helps accustom the subject’s eyes to the 

bright light and minizes the red-eye phenomenon. 

Red-eye reduction flash

2nd curtain flash fires just before the shutter closes. 

Changing the flash timing can create interesting 

effects in your picture. The slower the shutter speed, 

the better the effects turn out. 

Slow synchronization (2nd curtain)

Automatic exposure

12 mm
14 mm
18 mm
25 mm
35 mm
43 mm
53 mm

12.7/42
14/46
16/52
18/59
19/62
21/69
23/75

9/29
10/33
11/36
12.7/42
13.5/44
15/49
16.5/54

6.4/21
7/23
7.8/26
9/29
9.5/31
10/33
11/36

4.5/15
5/16
5.5/18 
6.4/29
6.7/31
7/23
8/26

3.2/10
3.5/12
4/13
4.5/15
4.7/15.5
5/16
5.6/18

18/59
20/65
22/72
24/79
27/88
30/98
33/108

The flash unit does not start charging.

Batteries are not correctly installed

Mount the flash unit firmly on the camera's 

hot shoe.

The flash unit does not fire.

The flash unit is not firmly clipped on the camera

Replace the batteries if the recycle time

beyond 30 seconds.

Batteries are exhausted

>>>

>>>

>>>

Use manual exposure flash or an 

appropriate correction by the TTL exposure 

level custom setting.

The flash picture is overexposed or underexposed.

A reflective object or strong lighting near the subject

>>>

Set to TTL mode or other power level.

The unit is set for manual exposure mode

>>>

Turn on the switch again.

The flash unit is automatically powered off

>>>

This sign refers the danger or serious damage.

This sign refers the damage or defect.

x 4

Red

Green

Blue

Purple

Press together

Manual exposure at 6 power level 
(See guide number table below) 

AF assist light

Color Temperature

Flash
Duration
Wireless
Flash
Dimensions
Weight

Filter

guide

S ]

M ]

A ]

[        ]

Any available shutter 

speed can be set
Any available f-stop 

speed can be set

Any shutter speed/f-stop 
combination can be set

33 / 108 at 53 mm focal length (ISO 100 m/ft)
12 - 53 mm (9 mm with diffuse panel)
(Automatically set for the lens focal length)

4 x size AA batteries
(Size AA Ni-MH or lithium batteries usable)
200-1500 flashes according to the mode
(with alkaline batteries)

4 seconds with fresh alkaline batteries

Effective range of approx. 0.7 to 6m / 2.3 to 20 ft.
5600 K
1/800 (full power flash) sec.
1/800-1/20,000 (controlled flash) seconds

Slave function with 6 power level
(See guide number table below)

67(W) x 105(H) x 95(D) mm / 2.6(W) x 4.1(H) x 3.7(D) inches

230 g

TTL

Setting Di466 Four Thirds as the external flash.

The camera sets the flash mode according to various factors such 

as firing pattern and flash timing. Available flash mode depend on 

the exposure mode.

While using slow synchronization with flash 

shooting, you can also use this funtion to achieve 

red-eye reduction. When shooting a subject against 

a night scene, this function allows you to reduce the 

red-eye phenomenon. As the time from emitting 

pre-flashes to shooting is long in 2nd curtain 

synchronization, it is difficult to achieve red-eye 

reduction. Hence, only 1st curtain synchronization 

setting is available.

Slow synchronization / Red-eye reduction

Following functions are available on Panasonic cameras. Refer to 

camera owner's manual for details.

When taking pictures against a dark background 

landscape, this feature will slow the shutter speed 

when the flash is activated. Dark background 

landscape will appear brighter.

For Panasonic only

Slow synchronization

for FOUR THIRDS/MICRO FOUR THIRDS

466FT.Rev0310.1.2

2nd curtain flash fires just before the shutter closes. 

Changing the flash timing can create interesting 

effects in your picture. The slower the shutter speed, 

the better the effects turn out. 

Slow synchronization (2nd curtain)

12-53

For 4/3 Digital Cameras

for 

M

 and 

S

 mode ONLY

**

*Remark: Some camera models are originally programmed to disable the AF assist light 
function.

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