S18 Mini Flash vs FJ100 Speedlight: Pocket Flash Comparison
By Westcott | Published: 2026-10-25
Category: Comparisons
Compare the ultra-compact S18 Mini Flash with the more powerful FJ100 Touchscreen Speedlight to find the right pocket flash for your camera bag.
Quick answer
Choose the S18 Mini Flash if you prioritize extreme portability and low cost for occasional fill light. Pick the FJ100 Speedlight if you need more power, longer battery life, and touchscreen control for regular on-camera flash work.
Power and reach trade-off
The S18 Mini Flash offers 18Ws output with a guide number of 16 (ISO 100), which is a clear step up from a built-in camera flash but still limited for bouncing off ceilings or lighting groups. The FJ100 Speedlight delivers 100Ws output, giving you roughly three stops more light—enough to soften shadows with a small modifier or reach subjects across a room.
If you mostly shoot close-up candids or fill flash at parties, the S18’s power is sufficient. For portraits, events, or any scenario where you need to control light quality, the FJ100’s extra output makes a real difference.
Size and portability
At just 3.5 oz (100g), the S18 Mini Flash is truly pocket-sized and can slip into any camera bag compartment or even a jacket pocket. The FJ100 is larger and heavier, though still compact for a speedlight. The S18 wins on sheer portability, but the FJ100’s size is a reasonable trade-off for its added features and power.
Trade-offs at a glance
- Power output: S18 Mini Flash: 18Ws, GN16 (ISO 100). FJ100 Speedlight: 100Ws, suitable for modifiers and bounce. If you need to light groups or soften with diffusion, the FJ100 is the clear choice.
- Battery life: S18: uses standard AA batteries (no supplied runtime). FJ100: 575+ full-power flashes per charge with built-in rechargeable battery. FJ100 is better for extended shoots; S18 is fine for occasional use with spare AAs.
- Size and weight: S18: 3.5 oz (100g), fits in any pocket. FJ100: larger, still portable but not pocket-sized. Choose S18 for ultimate portability; FJ100 for more features in a still-compact package.
Product facts
- S18 Mini Flash: Ultra-compact and lightweight at just 3.5 oz (100g) making it easy to carry in any camera bag or pocket. You can always have it with you, even in the smallest bag, so you never miss a chance to add fill light.
S18 Mini Flash - FJ100 Touchscreen Speedlight Flash (100Ws): This compact 100Ws round-head speedlight delivers 575+ full-power flashes per charge, keeping you shooting longer with fewer battery changes. You can shoot an entire event or portrait session without worrying about swapping batteries or waiting for recharge.
FJ100 Touchscreen Speedlight Flash (100Ws)
Which flash fits you?
Best for
- Travelers and casual shooters who want a backup flash that disappears in a pocket
- Photographers on a tight budget who need a simple fill-light upgrade from built-in flash
Not ideal for
- Event or portrait photographers who need consistent power and long battery life
- Anyone planning to use light modifiers or bounce flash regularly
