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The G9’s Micro Four Thirds TTL system works with both Panasonic’s own dedicated flashes and a wide range of third-party units, so budget and feature set matter more than brand compatibility. Godox in particular has become the go-to third-party choice thanks to full TTL/HSS support and a reliable built-in radio trigger.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Godox TT350O | $80–$95 | Amazon · eBay |
| 2 | Godox V1 Flash | $260–$300 | Amazon · eBay |
| 3 | Godox TT685O | $110–$140 | Amazon · eBay |
| 4 | Panasonic Lumix DMW-FL200L | $150–$180 | Amazon · eBay |
| 5 | Panasonic DMW-FL360L | $220–$250 | Amazon · eBay |
| 6 | Nissin i60A | $190–$210 | Amazon · eBay |
| 7 | Nissin MG10 | $150–$180 | Amazon · eBay |
The picks, in detail
Godox TT350O
A compact, budget-friendly flash with full TTL and HSS compatibility and a built-in 2.4GHz radio trigger — the most commonly recommended starting point for G9 owners.
- TTL and HSS compatible
- Built-in 2.4GHz radio trigger
- Guide number of 118 ft
- Compact, lightweight body
- Excellent value for full TTL/HSS support
- Small enough to not overwhelm the G9’s body
- Built-in radio trigger simplifies off-camera flash setups
- Lower power output than the V1 or TT685O
- Basic build compared to Panasonic’s own units
Godox V1 Flash
A round-head flash design with strong 76Ws output, a modern feature set that’s become an industry reference point for third-party speedlights.
- Round flash head design
- 76Ws power output
- Built-in radio system
- Rechargeable lithium battery
- More power than the TT350O for demanding shoots
- Round head gives more natural catchlights and falloff
- Fast recycle times with the lithium battery
- Bulkier and heavier than the TT350O
- Higher price point
Godox TT685O
A full-featured mid-tier flash with a longer zoom range and stronger guide number than the TT350O, while staying more affordable than the V1.
- Guide number of 197 ft at ISO 100
- 20-200mm zoom range
- Built-in 2.4GHz radio system
- Full Olympus/Panasonic TTL support
- Strong middle ground of power, features, and price
- Long zoom range covers telephoto shooting well
- Full native TTL support for the G9
- Larger and heavier than the TT350O
- Less refined ergonomics than the V1
Panasonic Lumix DMW-FL200L
Panasonic’s own dedicated flash, optimized specifically for Micro Four Thirds bodies and fully compatible with the G9’s native TTL system.
- Optimized for Micro Four Thirds
- Full native Panasonic TTL support
- Compact dedicated design
- Guaranteed native compatibility, zero setup guesswork
- Compact size matches the G9’s form factor
- Simple, dedicated integration
- Less power and fewer features than third-party alternatives at a similar price
- Locked into Panasonic’s ecosystem
Panasonic DMW-FL360L
A more powerful native Panasonic flash using 4 AA batteries for faster recycle times, matching the TT350O’s power in a dedicated Panasonic unit.
- 4 AA battery power
- Fast recycle time
- Full native TTL support
- Faster recycling than lithium-based competitors at similar power
- Fully native, no compatibility concerns
- AA batteries are easy to source anywhere
- Pricier than the equivalent-power Godox TT350O
- AA batteries add ongoing cost versus rechargeable lithium
Nissin i60A
A well-regarded third-party alternative to Godox, offering a different ergonomic feel and reliable TTL performance for Micro Four Thirds.
- Full TTL support
- Compact body
- Wireless flash control
- Good alternative if you prefer Nissin’s interface over Godox
- Reliable, established TTL performance
- Reasonable price for the feature set
- Smaller accessory/support ecosystem than Godox
- Similar price to more powerful Godox options
Nissin MG10
An ultra-lightweight flash at just 5 oz, with high-speed sync to 1/8000 sec — a great pick if minimizing bulk on the G9 is the priority.
- Just 5 oz weight
- High-speed sync to 1/8000 sec
- Guide number of 33 ft at ISO 100
- Lightest option on this list by far
- Very fast HSS sync speed
- Barely noticeable added bulk on the camera
- Lower guide number/power than every other option here
- Best suited to fill flash, not as a primary light source
Buying tips
- If you’re shooting off-camera flash, Godox’s built-in radio trigger ecosystem (TT350O, V1, TT685O) makes multi-flash setups far simpler than mixing brands.
- For pure convenience and zero compatibility guesswork, Panasonic’s own dedicated flashes are the safest choice — you’re paying a premium for that certainty.
- The Nissin MG10’s ultra-light weight is worth the power tradeoff if you’re shooting handheld for long stretches, especially for fill flash rather than a primary light source.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.