ULANZI SL03 Camera Mini Flash Speedlite with Video Light
Quick take
The ULANZI SL03 is a tiny, pocketable shoe-mount mini speedlite built for beginners who want simple flash fill indoors and a basic constant light for video or close-up work. It is manual and non-TTL, and it only works with cameras that have a single-contact hot shoe, so compatibility is the biggest thing to double-check before you buy.
Pros and cons
Pros
- Compact size and very low weight, easy to carry as a backup flash.
- Manual brightness control with 4 levels, helpful for dialing in fill without menu complexity.
- 90° flash head adjustment plus an added constant “fill light” mode for simple lighting.
- Built-in rechargeable battery with Type-C charging (supports charging while in use).
Cons
- No TTL, no automation, so you will need to adjust exposure and shutter settings yourself.
- Single-contact hot shoe requirement limits compatibility, and some camera models are explicitly not supported.
- Designed around a max sync speed of 1/250s, so faster shutter speeds can cause issues.
- Output is strong enough for fill, but it may be easy to over-brighten subjects if you do not manage distance and power.
What buyers think
Buyer-review evidence is focused on convenience, size, and real-world usability. Shoppers commonly describe the SL03 as smaller than expected in a good way, easy to pocket, and straightforward to use on compatible cameras (including Micro Four Thirds users and older film cameras). Many notes also emphasize that it works well as a secondary or backup flash, particularly for occasional fill lighting and for situations where you want a compact light source ready to go. A recurring theme is that brightness control is limited compared with more advanced speedlites, so the on-camera results depend heavily on dialed-in settings like power level, distance, and shutter speed.
What the ULANZI SL03 is, and who it is for
The SL03 is a mini shoe-mounted flash speedlite with two modes: a flash mode for bursts and a constant “fill light” mode aimed at basic video light or auxiliary illumination. It is meant for quick setups rather than high-end automation, and it is especially appealing if you want something small enough to live in your bag.
This makes it a strong fit for:
- Beginners learning flash basics (fill, distance, exposure relationships).
- Photographers who want a compact backup speedlite for indoor portraits, events, and travel.
- Casual macro or close-up shooters who occasionally need a steady light source.
You may want to look elsewhere if you need:
- TTL automation, because the SL03 is manual and not designed to meter through the camera.
- A plug-and-play solution across many hot-shoe types, because it depends on the single-contact hot shoe standard.
- Very high sync or high-power flash performance, since it is built as a mini unit with a max sync speed of 1/250s.
Key features that affect real shooting
Single-contact hot shoe compatibility (critical)
The SL03 is made for cameras with a single-contact hot shoe. That matters because two cameras that both “fit” a hot shoe can still be incompatible if they use different contact patterns or silent-mode behaviors. If you shoot in silent mode, you may need to turn silent mode off for flash use.
The brand also lists models that are not compatible, including several Sony, Canon entry-level models, and certain Fujifilm bodies that you should verify against before purchasing.
Manual brightness control and sync speed
The flash offers 4 adjustable brightness levels (1/1, 1/2, 1/4, 1/8). In practice, that means you will likely spend time matching power, ISO, and aperture to the scene. For optimal results, it is also important not to exceed the stated maximum shutter speed of 1/250s.
90° angle adjustment for softer indoor light
The SL03 includes a 90° adjustable flash angle, which can help when you bounce flash off a white wall or ceiling to soften shadows. However, bounce-light techniques depend on the environment, so outdoors or in rooms with high ceilings may not produce the same softening effect.
Two practical output modes: flash and constant fill light
Flash mode is described with a GN8 guide number (at ISO 100) and a 6500K color temperature target. The constant fill light mode uses a different color temperature target (around 5600K) and is intended for close-range lighting and simple video-light needs.
Rechargeable battery and Type-C convenience
The SL03 uses a built-in 250mAh rechargeable battery. Charging is via Type-C (5V 1A), and you can charge while using, which is helpful if you are shooting for short stretches and do not want to hunt for spare batteries.
Pros and cons in plain terms
- If you want compact fill: The SL03 is designed for it, and buyers often mention it performs well as an extra flash in a small kit.
- If you want automatic exposure: You will have to do the dialing in yourself because it is manual and non-TTL.
- If you need bounce flexibility: The 90° head helps, but bounce results depend on your room setup and ceiling height.
- If you need broad compatibility: Single-contact hot shoe matching is the deciding factor, and silent-mode behavior may require a setting change.
Should you buy it? (verdict)
The ULANZI SL03 is a sensible choice for beginners or hobbyists who want a small, rechargeable shoe-mount mini flash for indoor fill lighting and occasional constant light needs. It is best approached as a manual lighting tool, not an all-in-one automation solution. If you confirm your camera uses a single-contact hot shoe and you are comfortable adjusting flash power and shutter speed, it is likely to be a practical addition. If you rely on TTL or want effortless compatibility across many hot-shoe variations, you may be happier with a more fully featured speedlite designed for automation.
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FAQ
Does the ULANZI SL03 support TTL?
No. The SL03 is manual and non-TTL, so you will need to adjust exposure using power level, shutter speed, ISO, and aperture.
What hot shoe type does the SL03 need?
It requires a single-contact hot shoe. If your camera uses a different hot-shoe design, the SL03 may not work. Also note that silent mode can affect flash firing, so you may need to disable silent mode.
What is the maximum shutter speed for the SL03?
The SL03 is specified for a max shutter speed of 1/250s, so avoid going faster than that to reduce timing issues.
Is the 90° angle adjustment good for bounce lighting?
It can be useful indoors when you have nearby white walls or ceilings to bounce off. Bounce effects may be limited outdoors or with high ceilings where the light cannot reflect effectively.
Is the constant “video light” mode useful for close-ups or video?
Yes, it is intended to provide steady auxiliary illumination. It can help for close-up lighting and basic video setups where you want a constant light source.
Does it have rechargeable battery support?
Yes. It includes a built-in rechargeable battery and supports Type-C charging (and charging while in use).
Specifications
| Product Title | ULANZI SL03 Camera Mini Flash Speedlite with Video Light for Beginners Basic, GN8 6500K Flash 90° Angle Adjustable Compatible with Sony/Canon/Fuji/Nikon DSLR, Universal Single Contact Hot Shoe Mount |
|---|---|
| Category | Electronics > Camera & Photo > Flashes > Shoe Mount Flashes |
| Brand | ULANZI |
| Manufacturer | ULANZI |
| Model Name | SL03 Camera Flash Speedlite Black |
| Model Number | SL03 Black |
| Color | Black |
| Item Weight | 43 Grams |
| Compatible Mountings | FUJI: X-Pro2, X-T2O, X-T2, X-T1, GFX5Os, GFX5OR, X-T3O, X-T4, X-T3, X-Prol, X-T1O, X-E1, X-T5, X-M5; Panasonic: GH4, LX100, GF1, G85, GX85, FZ2500GX, S1R, GH5, G7; Leica: SL1, M10, Q2, TYP601, CL, SL2; Olympus: E-M1, PRN-F, E-M1OII, E-M1OIl, E-PL8, E-P5, E-M5I; Pentax: K-3I1, 645Z, KP, K-7O, K-S2, K-1, K5O;, SONY: A7III, A7IV, A7R5, A7RII, A7RIV, A9, A7RII/V4.O, A7R, A6400, RX10, ZV-1, ZV-E10; CANON: 5DII, 5DIV, 70D, 80D, 1DX, 850D, 760D, 5DII, 7DII, 6DII, 6D, 800D, 90D, 60OD, 7D, M6, M5, M3, EOS RP, EOS R, R5, 60D; NIKON: D800, D780, D5, D4, D500, D610, D750, D700, D300S, D3300, D3100, D5300, D5200, D5000, 27II, 26,Z8, ZFC, D200, D60, D5100, D7500, D7100; |
| Battery Average Life | 5 years |
| Flash Sync Speed | 1/250s |
| Connectivity Technology | Hot Shoe Mount |
| Guide Number | 8 |
| Number of Batteries | 1 AAA batteries required. (included) |
| Wireless Technology | Optical Pulse |
| Mount Type | Hot Shoe Mount |
| Color Temperature | 6500 Kelvin |
| Item Dimensions D x W x H | 0.9"D x 1.7"W x 2.7"H |
| Compatible Devices | CANON, FUJI, NIKON, OLYMOUS, PENTAX, SONY |
| Audio Recording | No |
| Maximum Shutter Speed | 1/250 seconds |
| Shooting Modes | On, Off |
| Exposure Control Type | Manual |
| Water Resistance Level | Not Water Resistant |
| Media Type | EnhancedContent |
| Camera Flash | Hotshoe |
| Built-In Media | A to C Charging Cable*1, Camera Flash*1;, User Manual*1; |
Available variants
Color
- White
- Black
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