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SmallRig RS20 Mini Speedlite Flash Silver 5818

SmallRig RS20 Mini Speedlite Flash Silver 5818

Product Code: 3150905R

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The SmallRig RS20 Mini Speedlite Flash Silver 5818 is a powerful ultra-compact universal on and off-camera flash that fits most mirrorless cameras and provides noticeably stronger output than built-in pop-up flash.

£41.00

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SmallRig RS20 Mini Speedlite Flash Silver 5818 Summary

The SmallRig RS20 Mini Speedlite Flash Silver 5818 is a compact, single-contact hot shoe flash for mirrorless cameras. It is a pocket-sized unit weighing 128g, intended as a step up from built-in camera flashes.

With a guide number of 12 and a fixed 6500K colour temperature, it delivers noticeably stronger and more consistent output than on-board flash systems. Power adjusts across eight stops with 22 selectable levels from 1/1 to 1/128, allowing control from full illumination to subtle fill. A built-in 2000mAh lithium battery supports USB-C charging and extended shooting sessions without AA cells. This flash suits photographers who want a lightweight, travel-friendly lighting solution for events, street portraits or indoor fill without carrying a larger dedicated flashgun.

SmallRig RS20 Mini Speedlite Key Features

  • Guide number 12 provides stronger output than typical built-in flashes
  • Eight-stop power range with 22 selectable levels from 1/1 to 1/128
  • Integrated 2000mAh lithium battery supports USB-C charging
  • Up to 500 full-power flashes per charge
  • Recycle time ranges from 0.1 seconds at low power to 1.8 seconds at full power
  • Single-contact hot shoe ensures broad compatibility with most mirrorless cameras
  • OLED screen displays power level, battery status and trigger mode
  • Supports slave trigger mode for multi-flash setups

SmallRig RS20 Mini Speedlite Flash Silver 5818 In More Detail

Compact size with higher output

The RS20 measures 46.0 x 71.0 x 73.0mm and uses a lightweight ABS housing. At 128g, it adds minimal weight, even to smaller camera bodies. Despite its size, the GN12 rating provides approximately 350% more brightness than many built-in pop-up flashes. This enables improved subject separation and more balanced indoor exposures.

Manual power control

Flash output spans eight stops with 22 levels of adjustment between full power and 1/128. This range allows precise control for bounce techniques, close portraits or subtle fill. The OLED display shows the selected power level clearly, supporting rapid adjustments during changing conditions. Maximum sync speed is approximately 1/250 second, aligning with most mirrorless mechanical shutter limits.

Battery performance and charging

The integrated 3.7V 2000mAh battery charges via USB-C at 5V 1A, with a typical charging time of around three hours. At full power, it supports roughly 500 flashes per charge. At lower power levels, flash count increases substantially, reaching up to 10,000 flashes at minimum output depending on usage patterns. This removes the need for disposable batteries and simplifies travel.

Recycle speed and continuous shooting

Recycle time ranges from approximately 0.1 seconds at minimum power to 1.8 seconds at maximum power. This enables fast-paced shooting in event or reportage environments where rapid response is required. At reduced output, multiple frames can be captured in quick succession without waiting for recharge.

Trigger flexibility

In addition to direct hot shoe firing, the RS20 supports slave trigger mode, allowing it to fire in response to another flash. This supports simple multi-light configurations without additional transmitters, suitable for small indoor setups or background accent lighting.


Frequently Asked Questions

Is the RS20 compatible with all cameras?

It uses a universal single-contact hot shoe and works with most mirrorless cameras that support standard manual flash triggering.

Does it support TTL metering?

No. It operates as a manual flash with adjustable power levels.

How many flashes can it produce on one charge?

Approximately 500 flashes at full power, with significantly more at lower output settings.

What is the recycle time?

Recycle time ranges from around 0.1 seconds at minimum power to about 1.8 seconds at maximum power.

Can it be used off-camera?

Yes. It supports slave trigger mode for basic off-camera flash setups.

Is it stronger than a built-in flash?

Yes. With a guide number of 12, it delivers noticeably higher output than typical integrated flashes.

SmallRig RS20 Mini Speedlite Flash Silver 5818 Specifications

SKU

5585

Compatibility

iPhone 17 Pro

Voltage

3V

Current

3mA

Rated Power

0.009W

Remote Battery

3V / 225mAh / 0.675Wh

Product Dimensions

182.7 x 99.5 x 12.5mm

Product Weight

411.9g ±10g

Materials

PC; TPU; Aluminium Alloy

What’s in the Box

  • SmallRig RS20 Mini Speedlite Flash x 1
  • Storage Bag x 1
  • USB-C Charging Cable x 1
  • Operating Instruction x 1

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Condition guide

Our used products are subject to wear and tear in comparison to brand new products. This also applies to accessories that are supplied with the camera including batteries which may have a lower optimum performance level/life expectancy.

  • Like New – The equipment is in a condition as if you have just bought it from the manufacturer. The item is still considered to be ‘Like New’ even without the original packaging and accessories. The product has been fully tested and is in perfect working order. Lenses are optically clear. There may be light dust present that will not effect the imagery.
  • Excellent – The equipment should be close to being ‘Like New’ but there may be some small cosmetic blemishes that lower its grade. The product has been fully tested and is in perfect excellent order.
    • Cameras – Should have no marks on the LCD screen
    • Lenses – Should have no marks on the elements and optically clear. There may be light dust present that will not effect the imagery.
  • Very Good – The equipment may have some slight cosmetic wear to the paintwork and cosmetic blemishes  with only light signs of use and the product has been fully tested and is in great working order.
    • Cameras – The LCD screen may have small signs of wear that does not affect its display
    • Lenses – The mount of the lens will start to show signs of wear
  • Good – The equipment is showing more obvious signs of cosmetic wear and blemishes, but the product has been fully tested and is in great working order.
    • Cameras – LCD screen may have scratches or wear that is starting to affect the display.
    • Lenses – May have slight dust inside that does not affect images. The mount shows signs of use.
  • Well Used – The equipment will show significant signs of wear. The paintwork will be coming away in large areas exposing the metal work, but the product has been fully tested and is in great working order.
    • Cameras – LCD screen is heavily worn either by de-lamination or has scratches to it. Rubber grips are starting to come away from the body.
    • Lenses – The lens has dust inside that may affect images. The rubber zoom/focus ring is coming away from the barrel of the lens.

*All of our used items are listed with the accessories that are included. If they are not listed, then they will not be supplied at the point of purchase.

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