Gemini GS300II - Lighting GODOX - Free user manual and instructions
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| Product Type | Studio Flash / Strobe |
| Brand | Godox |
| Model | Gemini GS300II |
| Power Output | 300 Ws (adjustable) |
| Modeling Lamp | 150W LED (adjustable brightness) |
| Flash Tube | Ring tube with built-in reflector |
| Power Control | Continuous 1/64 to 1/1 in 1/10 stop increments |
| Slave Mode | Optical slave (S1/S2) and wireless X-system |
| Recycle Time | Approx. 0.3–1.5 seconds |
| Flash Duration | 1/2200 to 1/900 sec (t.5) |
| Color Temperature | 5600K ± 200K |
| Sync Voltage | Up to 250V (sync socket) |
| Dimensions (with bracket) | Approx. 24 x 16 x 15 cm |
| Weight | Approx. 2.8 kg |
| Power Supply | AC 100-240V, 50/60Hz |
| Power Consumption | 350W (max) |
| Cooling System | Silent fan (speed adjustable) |
| Chassis Material | Aluminum alloy with hard coating |
| Mount | Bowens mount for modifiers |
| Flash Tube Protection | Removable glass dome |
| Maintenance | Clean with soft dry cloth; avoid liquids |
| Safety | Overheat protection, flash tube grounding |
| Spare Parts / Repairability | Flash tube, modeling lamp, power board available |
| Included Accessories | Sync cable, power cord, protection cap |
Frequently Asked Questions - Gemini GS300II GODOX
How do I connect the Godox Gemini GS300II to a camera?
You can connect via sync cable (PC sync port) or use a wireless trigger like the Godox X2T. The flash supports optical slave (S1/S2) as well.
Can I adjust the power output continuously?
Yes, power is adjustable from 1/64 to 1/1 in 1/10 stop increments using the control dial on the back.
What type of light modifiers can I use with this flash?
The GS300II uses a standard Bowens mount, so you can attach softboxes, umbrellas, beauty dishes, and other Bowens-mount modifiers.
How do I replace the flash tube?
First, unplug the flash and wait 10 minutes for capacitors to discharge. Remove the protective glass dome, then gently pull out the old tube. Insert the new tube without touching the glass, and replace the dome.
Does the modeling lamp have variable brightness?
Yes, the 150W LED modeling lamp brightness can be adjusted independently from 0% to 100%.
Is there a fan noise?
The flash has an adjustable silent cooling fan. The speed can be set to auto or low/high via the control panel.
Can I use this flash with a battery pack?
No, the GS300II is an AC-powered studio flash and requires a mains power supply. For portable use, consider Godox's AD-series battery-powered flashes.
How do I clean the flash unit?
Use a soft, dry cloth to wipe the exterior. Never use liquids or solvents. The flash tube and modeling lamp can be gently dusted with a brush.
What is the recycle time at full power?
At full power (300Ws), the recycle time is approximately 1.5 seconds. At lower power settings, it can be as fast as 0.3 seconds.
Does the flash have thermal protection?
Yes, the GS300II includes overheat protection that will automatically shut down if internal temperature exceeds safe limits.
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