GT200 - Flash Geekoto - Free user manual and instructions

USER MANUAL GT200 Geekoto

GEEKOTO GT-200 INSTRUCTION MANUAL FCE CE RoHS Made in China [e-mail]

Contents

• 01 - Foreword
• 02 - Warning
• 03 - Part Name
• 09 - Battery
• 10 - Power management
• 10 - Modeling lamp
• 10 - Wireless mode selection
• 11 - TTL Flash mode
• 12 - M Manual
• 13 - S1/S2 Flash mode
• 14 - Multi-frequency flash mode
• 16 - Group setting / channel setting
• 17 - Wireless flash shooting
• 19 - C.Fn: Set custom features
• 20 - Specifications

Foreword

Before using this product

Please read this manual carefully to ensure that you can use it safely. Please save this manual for future reference.

Gt200 flash is a wireless TTL flash with built-in 2.4G wireless 阵 system, with this C series trigger can remotely control the function of TTL/M/Multi mode of GT200 flash; at the same time, it can also be used in combination with the TTL master-slave function flash, TTL Outdoor flash speedspeedlite and the TTL studio light. With the GT200 flash, you'll get a simpler shooting experience with complex lighting changes. Accurate flash exposure is automatically obtained for comfortable shooting.

The GT200 is a portable flash solution consisting of a flash, wireless remote trigger, and various light effects accessories. Program. GT200 flash, compact and portable, powerful, built-in battery capacity, support full speed, for Outdoor shooting and live shooting provide good light quality. Portable and efficient light quality, it is free business An ideal source for photographers, journalists, enthusiasts, photographers, and wedding documentary photographers.

Product highlights :

Wireless TTL system is fully compatible: With built-in GEEKOTO 2.4G wireless system. It can support Canon E-TTL, Nikon i-TTL and other TTL automatic flash system; can be used as a slave unit of a wireless multi-lamp flash system, shooting is fast and straightforward.

Sturdy, compact and portable: The flash power is up to 200W, making it easy to carry.

Replaceable lamp holder, a variety of light-emitting methods: Easy to carry, with multiple sets of optical lenses, uniform light, LED modeling lights.

High-quality AV display: intuitive display and smooth operation.

Built-in 2.4G wireless transmission: 50 meters ultra-long distance.

Studio light quality: power up to 200Ws.

Creative unlimited professional power supply: use well-known Korean brand battery, large capacity power box (14.4V/2900mAh), 0.01-2.1s callback, full light 500 flashes or more.

Warning

Wireless control: Built-in GEEKOTO 2.4G wireless system, can realize TTL control, external can use GEEKOTO C-1 (Commander) remote control, wireless control flash power size and trigger flashing simultaneously; while leaving 3.5mm sync jack, can be realized A variety of synchronous triggering methods.

Dimming accuracy: The power adjustment range is broad (1/1-1/128), and the 22-level precision is fine-tuned.

The color temperature is constant: the color temperature is maintained in the range of 5600 ± 200K .

Advanced features: support 1/8000 second high-speed synchronization, high-speed strobe, high-speed remote control synchronization trigger.

▲ Please keep it dry.
Do not disassemble the product. If the product fails, it must be inspected and repaired by our company or authorized maintenance personnel.
Do not allow children to come into contact with this product
Do not disassemble, impact, crush or put into fire. If there is severe swelling, do not continue to use it. Do not place in a high-temperature environment exceeding 50 degrees.
Do not flash the flash head directly against the human eye (especially the baby's eyes), as it may cause visual impairment in a short period of time.
Do not use the flash near chemicals, flammable gases, or other special substances that may be sensitive to the flash of the flash speedlite under special conditions and may cause the fire or electromagnetic interference. In these cases, please pay attention to the relevant warning signs.
This product is not waterproof. Please pay attention to waterproof in rainy and humid environments.
If any malfunction occurs, turn off the flash immediately.

Name of Parts

Body: Battery Release Slider Lithium Battery Light Sensor Battery Compartment Power Switch 2.5mm Sync Cord Socket 03 04

Name of Parts
Body:

Ventilation Area USB Port (for firmware upgrade) LCD Control Panel

Name of Parts

Body: + Button Button (long press for custom function) - Button Group/ Channel Button (long press for channel) Reset (pressing GR/CH button and MODE button at the same time) MODE/Modeling Lamp button (Long Press for modeling lamp) Flash Ready Indicator/ Test Button

AV Panel

S1/S2 Mask M/Multi TTL Battery Level C.Fn Flash Compensation Level Group 2.4G Wireless Channel TTL Multi S1 S2 7/7 C Fn 1/18.8 + 8.8 Overheat Protection Frequency sec min Hz Modeling Lamp HHS Beeper Standby Timer Min Sec

•The display will only show the settings currently applied.

- When button is pressed, the AV panel will illuminate automatically.

Name of Parts
(1)TTL Auto-flash

TTL: Auto-flash + 0.0 Auto-flash Output A CH

(2)M Manual Flash

M: Manual Flash 1/128 R CH Manual Flash Output

Name of Parts Name of Parts

(3)Multi Strobe Flash

Multi: Strobe Flash 1/128-40 Number of Flashes R (q) CH 16 199 Hz Flash Frequency

(4) S2 Slave Mode

S2: Slave Mode 1/128 R(1) CH 1

(4)S1 Slave Mode

S1: Slave Mode S1 1/128 R(ω) CH 1

(5)Custom Mode

C.Fn Custom Mode F 1-0F

Lithium Battery Power Management

Features

1. This flash unit uses Li-ion polymer battery which has a long service life. When the battery is fully charged, it will offer 500 times of charge and discharge cycles.
2. Battery is safe and reliable. The inner circuit of the battery is designed against over-charge, over-discharge, over-current and short circuit.
3. This battery takes only four hours to be fully charged.

Cautions

1. Do not short circuit.
2. Do not expose to moisture or submerge into water. This battery is not waterproof.
3. Keep out of reach of children.
   4.Do not charge the battery continuously over 24 hours.
4. Store in dry, cool, ventilated places.
   6.Do not dispose in fire.
5. Scrapped batteries should be disposed of according to local regulations.
6. Please charge the battery to 60% for long-term storage.
7. If the battery has been stored for over 3 months, please recharge the battery.

Battery Level Indication

Make sure the battery pack is securely loaded in the flash. Check the battery level indication on the AV panel to see the remaining battery level.

Battery Level Indication on the AV Panel	Meaning
3 Bars	Full battery
2 Bars	Medium battery
1 Bar	Low battery
Blank	Lower battery, please recharge.
Blinking	Battery exhausted, the flash will auto power off in 1 minute.Note: when in this state, Please recharge the battery as soon as possible (within 10 days).Then the battery can be used or be placed for long periods.

ON/OFF Power Switch controls the on/off of the flash unit, please turn off the power when not in use. This product is designed with automatic standby feature, it will go to standby mode when not operated, (approx. 30/60 minutes).

Modeling Lamp

TTL + 0.0 SET A CH GR/CH MODE/Q

Long press button until the 🔒 display on the AV panel for turning on the LED modeling lamp.

Wireless Flash Mode

GT-200 can only be set as a slave unit (receiver en d). Long press the wireless selection button for 2 seconds to switch the radio transmission function.

Wireless Mode	Flash Mode
OFF	M / Multi
Radio Transmission	TTL / M / Multi

TTL Autoflash

This flash has three flash modes: TTL, Manual (M), and Multi (Strobe). In TTL mode, the camera and the flash will work together to calculate the correct exposure for the subject and the background.

Press < Mode/ ♀> button to cycle through all three flash modes.

TTL Mode

Press button to enter TTL mode. The AV panel is displayed .

Flash Compensation

With flash compensation function, this flash can adjust from -3 to +3 in 1/3rd sto ps. It is useful in situations where minor adjusting of the TTL system is needed based on the environment.

Setting Flash Compensation:

TTL SET + 0.0 R CH GR/CH MODE/9 +

• Press <+>, "+0.3" means 1/3 step, "+0.7" means 2/3 step.
• Press <->, "-0.3" means 1/3 step, "+0.7" means 2/3 step.
• To cancel flash compensation, set the amount to "+0".

High-Speed Sync

High-Speed Sync (FP flash) enables the flash to synchronize with all camera shutter speeds. This is convenient when you want to use aperture priority for fill-flash portraits.

- With high-speed sync, the faster the shutter speed, the shorter the effective flash range.

- Multi-strobe mode cannot be set in high-speed sync mode.

Manual Flash

In manual mode, you can cycle through all the power output 1/128 to 1/1 in 1/3-stop increments.

For a proper exposure, please use an external flash meter or the meter within the camera.

M + BET 1/128 R CH MODE/Q $GRI/CH M 1/128+0.3 R CH 1

1. Press button, until the AV panel display .
2. Press <+> <-> button to set desired flash output.

Flash Output Range

The following table makes it easier to see how the f/stop changes when you increase or decrease the flash output. For example, when you decrease the flash output to 1/2, 1/2-0.3, or 1/2-0.7, and then increase the flash output to more than 1/2, 1/2+0.3, 1/2+0.7, and 1/1 will be displayed.

Figures displayed when reducing the flash output level→

	1/1-0.3	1/1-0.7		1/2-0.3	1/2-0.7	1/41	......
	1/2+0.7	1/2+0.3		1/4+0.7	1/4+0.3		......

←Figures displayed when increasing the flash output level

S1/S2 Flash Mode

S1 1/128 R OFF MODE V SET

Optic S1 Secondary Unit Setting

Press to choose S1 function so that this flash can function as an optic Slave flash. With this function, the flash will synchronize with the main flash, the same effect as that by the use of radio triggers. This helps create a multiple lighting effects.

S2 OFF 1/128 AHz ON/OFF

Optic S2 Secondary Unit Setting

Press to choose S2 function, so that this flash can also a optic slave flash in M manual flash mode. This is useful when cameras have pre-flash function. With this function, the flash will ignore a single "pre-flash" from the main flash and will only fire in response to the second, actual flash from the main unit.

Multi Strobe Flash

With strobe flash, a rapid series of flashes is fired. It can be used to capture multiple images of a moving subject in a single photograph. You can set the firing frequency (number of flashes per sec. expressed as Hz), the number of flashes, and the flash output.

Multi 1/128-1 A CH MODE/Q + SET GR/CH

Multi 1/128- A(μ) CH 1 188 Hz

Press button, until will display on the AV panel.

Setting the Number of Flashes and Flash Frequency

Press button to choose flash frequency and press <+> <-> to set the number. Press button to choose flashes, and press <+> <-> to set the number.

Calculating the Shutter Speed

During the strobe flash, the shutter remains open until the firing stops. Use the formula below to calculate the shutter speed and set it with the camera.

Number of Flashes / Flash Frequency = Shutter Speed

For example, if the number of flashes is 10 and the firing frequency is 5 Hz, the shutter speed should be at least 2 seconds.

To avoid overheating and deteriorating the flash head, do not use stroboscopic flash more than 10 times in succession. After 10 times, allow the camera flash to rest for at least 15 minutes. If you try to use the stroboscopic flash more than 10 times in succession, the firing might stop automatically to protect the flash head. If this happens, allow at least 15 minutes' rest for the camera flash.

- Stroboscopic flash is most effective with a highly reflective subject against a dark background.

• Using a tripod and a remote control is recommended.
- A flash output of 1/1 and 1/2 cannot be set for stroboscopic flash.
- Stroboscopic flash can be used with "buLb".
- If the number of flashes is displayed as “--”, the firing will continue until the shutter closes or the battery is exhausted. The number of flashes will be limited as shown by the following table.

Maximum Stroboscopic Flashes

Flash output\Hz	1	2	3	4	5	6-7	8-9	10	11	12-14	15-19	20-50	60-99
1/4	7	6	5	4	4	3	3	2	2	2	2	2	2
1/8	14	14	12	10	8	6	5	4	4	4	4	4	4
1/16	30	30	30	20	20	20	10	8	8	8	8	8	8
1/32	60	60	60	50	50	40	30	20	20	20	18	16	12
1/64	90	90	90	80	80	70	60	50	40	40	35	30	20
1/128	90	90	90	90	90	90	80	70	70	60	50	40	40

Group Setting / Channel Setting

GT-200 adopts GEEKOTO 2.4G wireless system, which has good compatibility with other products of our lineup.

As a slave unit, GT-200 is automatically compatible with Canon / Nikon / Sony / Fujifilm TTL system according to the master unit.

By using GEEKOTO C1(Commander) trigger you can use one or more GT-200-TTL flashes simultaneously.

1. Setting Communication Group

Short press wireless button to switch group in A / B / C / D.

TTL + RET 0.0 A - MODE/2 $GUCH

TTL + 0.3 |A_(CH)|

2. Setting Communication Channel

Long press wireless button till "CH 1" flashes on the AV panel. Then press <+> <-> to switch channel from 1 to 16.

TTL SET + 0.0 A CH MOOE/V → OUTCH

TTL + 0.3 R(CH)

Wireless Flash Shooting

Positioning and operation Range (Example of wireless flash shooting)

•Auto-flash shooting with one slave unit

MASTER SLAVE

Transmission distance is about 50 meters.

• Use the supplied stand to position the slave unit.
• Before shooting, perform a test flash and test shot.
• The transmission distance might be shorter depending on the conditions such as the positioning of slave units, the surrounding environment and weather conditions
• With a lot of wireless signal interference, if there's a miss flash please change the wireless communication channel.

Wireless Flash Shooting

Wireless Multiple Shooting

You can divide the slave units into two or three groups and perform TTL autoflash while changing the flash ratio (factor). In addition, you can set and shoot with a different flash mode for each firing group, for up to 4 groups.

Illustration of a cat observing three labeled objects (A, B) with no visible text or symbols

• Auto Shooting with Two Slave Groups

Diagram showing a cat interacting with three labeled objects (A, B, C) around a central device, possibly illustrating a safety or monitoring system.

•Auto Shooting with Three Slave Groups

When using the GT-200 and GEEKOTO C1(Commender) series trigger together, the C1 can control the flash function such as:

• Flash Mode: TTL/M/Multi
• Sync Mode: First-curtain sync, second-curtain sync, and High-speed sync
• Control the power level
• Modeling Lamp ON/OFF
• Beeper ON/OFF

C.Fn :Setting custom Functions

The following table lists the available and unavailable custom functions of this flash.

Custom Function Signs	Functions	Setting Signs	Setting & Descriptions
F1	Standby Modes	OF	OFF
		30 min	No Operation Auto Standby
		60 min
F2	Beeper	ON	ON
		OFF	OFF
F3	Mask	OF	OFF
		01	ON: Trigger 2 times for 1 cycles, 1st flash of the trigger.
		02	ON: Trigger 2 times for 1 cycles, 2nd flash of the trigger.
F4	Delay Flash	OF, 0.01~30s	Can be triggered as the second curtain
F9	Version Information

1. Long press button for 2 seconds to enter the C.Fn menu.

2. Choose custom function signs. Press <+> <-> to set custom function signs.

3. Change the setting. Press button to choose between customize functions

4.Exit C.Fn menu. Long press button to exit.

TTL + 0.0 RET R CH GR/CH MODE/V

Technical Data

Model	GT-200
Wireless Slave Unit Mode	Radio transmission mode (compatible with Canon & Nikon & Sony & Fujifilm)
Flash Mode	Slave radio transmission	TTL/ M/Multi
Guide No. (1/1 Output)	53(m ISO 100, @35mm)
POWER	200W
Power Output	8 steps: 1/128~1/1
Stroboscopic Flash	Provides (up to 90 times, 99Hz)
Flash Compensation	±3 stops in 1/3 stop increments
Sync mode	High-speed sync (up to 1/8000 seconds), first-curtain sync, and second-curtain sync
Delay Flash	0.01~30s
Mask	√
Beeper	√
Modeling Lamp (LED)	√
Optic Slave Flash	S1/S2
Flash Duration Indication	√
•Wireless Flash (2.4G transmission)
Wireless Flash Function	Slave unit, OFF
Controllable Slave Groups	4 groups: A, B, C, D
Transmission Range (Approx.)	50m
Channel	1~16
•Power Supply
Power Supply	Lithium battery pack (14.4V/2900mAh)
Full Power Flashes	500
Recycle Time	Approx. 0.01-2.1s
Battery Indicator	√
Power Indication	Power standby automatically after approx. 30 minutes without operation.
•Sync Triggering Mode	2.5mm syncline, a wireless control port
•Color Temperature	5600±200k
•Dimensions
Volume
Net Weight