Profoto

Profoto 100501 RFi Speedring Adapter for Profoto Flashes

4.4 (62 reviews)

Connect RFi softboxes to your Profoto flash heads quickly with this color-coded speedring adapter.

$164.00*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Profoto 100501 RFi Speedring Adapter serves as the essential link between your Profoto flash heads and Profoto RFi softboxes. Without a speedring, the softbox has no way to mount to the light, making this a necessary component for anyone using RFi modifiers with Profoto strobes. The adapter features Profoto's color-coded rod system—each softbox rod is marked with a color that corresponds to a matching hole on the speedring, eliminating guesswork during setup and ensuring the softbox assembles correctly every time.

Built for professional use, the adapter is constructed to handle the rigors of repeated assembly and breakdown across studio sessions and on-location shoots. It locks firmly onto Profoto light heads, keeping the softbox stable and properly positioned throughout use. As a Profoto-specific accessory, it does not offer cross-brand compatibility, so it is intended exclusively for photographers working within the Profoto system. For those users, it is an indispensable piece of the lighting toolkit that makes modifier changes quick and reliable.

Key Features

Package Dimensions: 19.558 H x 10.922 L x 19.304 W (centimetres)

Just match the coloured rod with the appropriate color-coded hole on the Speed ring

Package Weight: 0.68 kilograms

Country of Origin : China

Specifications

Brand
Profoto
Model
100501
Type
RFi Speedring Adapter
Compatibility
Profoto flash heads
Color
Black
Package Dimensions
19.558 x 19.304 x 10.922 cm (H x W x L)
Package Weight
0.68 kg
Country of Origin
China

Pros & Cons

👍 Pros

  • Color-coded rod system makes softbox assembly fast and foolproof
  • Purpose-built for Profoto lights, ensuring a secure and stable fit
  • Durable construction withstands repeated setup and teardown on location
  • Compatible with the full range of Profoto RFi softboxes

👎 Cons

  • Only works with Profoto flash heads, offering no cross-brand compatibility
  • Premium price point compared to third-party speedring options
  • Does not include a softbox—purchased separately as an adapter only
  • Limited feature set as a single-purpose mounting accessory

Frequently Asked Questions

It allows you to mount Profoto RFi softboxes onto Profoto flash heads, providing the mechanical connection between the light modifier and the light source.
Each rod on the softbox is color-coded to match a corresponding hole on the speedring. You simply align the colored rod with the matching hole for fast, correct assembly every time.
No, this speedring adapter is designed specifically for Profoto flash heads. Other light brands require their own dedicated speedring adapters.
Yes, the RFi Speedring Adapter is designed to work with the full range of Profoto RFi softboxes.
The package weight is 0.68 kilograms.