Canon Speedbooster
Overview
Product sourcing insights & recommendations
The market for the Canon Speedbooster (officially the Mount Adapter EF-EOS R 0.71x) and its third-party alternatives has evolved into a strategic "bridge" category. It primarily serves videographers using Super35 sensors (like the EOS C70) and stills photographers using APS-C bodies (like the R7) who want to utilize the full-frame field of view of legacy EF glass.
1. Key Product Insights
The ecosystem is divided into three tiers:
* Premium Official (Canon 0.71x): Specifically optimized for the EOS C70. While it physically fits all RF-mount cameras, it is not officially supported for stills cameras like the R5 or R6, often triggering warning messages. Dpreview
* High-End Third-Party (Metabones Speed Booster ULTRA 0.71x): The most versatile option for consumer RF bodies (R7, R10). It supports RED Komodo and is highly regarded for its optical quality, though it carries a high price tag (~$480). Metabones
* Budget Alternatives (Viltrox, Meike, Commlite): Priced between $150 and $250, these options (like the Meike EFTR-0.71X) offer a lower entry point but sometimes suffer from slower autofocus or optical artifacts like "purple flare" in backlit scenes. UbuyDpreview
2. 2026 Market Trends
* The "Full-Frame Bridge" for APS-C: A major trend involves users pairing speed boosters with the Canon R7. This combination reduces the 1.6x crop to ~1.14x, effectively turning the R7 into a quasi-full-frame body for wider EF lenses. DpreviewDpreview
* Video-Centric Adoption: Boosters are increasingly used to mitigate the heavy 4K crop factors found in older RF bodies (original EOS R/RP) or to improve low-light performance by gaining +1 stop of light. BhphotovideoDigitalcameraworld
* Optical Artifact Awareness: Consumer feedback has highlighted a "purple circular flare" issue common in Canon and Viltrox models. Market leaders like Metabones have gained market share by minimizing these artifacts through superior internal flocking and glass coatings. DpreviewMetabones
3. Competitive Comparison
| Feature | Canon 0.71x | Metabones Ultra | Meike/Viltrox |
|---|---|---|---|
| Best For | C70 & C80 Cinema Users | R7/R10 Enthusiasts | Budget Video Shooters |
| AF Reliability | Best (on C70) | Very High | Moderate/Variable |
| MSRP | ~$599 | ~$480 | ~$150 - $220 |
| IS Support | Full | Full (some bugs at 12mm) | Basic |
4. Sourcing & B2B Analysis
B2B listings on platforms like Alibaba show a high volume of Viltrox and Commlite adapters, with wholesale prices for standard adapters (non-booster) as low as $80-$100 and speed boosters typically starting at $130-$150 for bulk orders (10+ units). Suppliers are increasingly focusing on "locking" focal reducers that provide a more secure, cinema-style connection for heavy EF lenses. Alibaba
Explore current trends and insights for related gear:
Viltrox Ef R2 0.71x Speedbooster Price And Moq
Products · 3 lists
VILTROX Lens Adapter EF-EOS M2 0.71x Speed Booster for Canon EF Lens to EOS EF-M Mirrorless Camera M50 AF Auto Focal Reducer
Viltrox EF-M2II Speed Booster Adapter Focal Reducer Auto-focus 0.71x for Canon EF Mount Lens to Panas0nic 0lympus M4/3 Camera
Shenzhen Lovefoto Technology Co., Ltd.verified🇨🇳CN16 yrs
Viltrox EF-M2 II Speedbooster 0.71x Adapter for Canon EF to M43 MFT
Shenzhen E-Reach Technology Co., Ltd.🇨🇳CN9 yrs
Viltrox NF-M43X 0.71x Speed Booster Lens Mount Adapter for F (G/D) Micro Four Thirds M4/3 Camera Body Manual Focus ABS
Shenzhen New Vision Photography Equipment Co., Ltd.verified🇨🇳CN7 yrs
Viltrox Speed Booster EF-FX2 0.71x for EF Lenses to Fuji X Mount Auto Focus Focal Reducer Lens Adapter Xt2 Xt3
Guangzhou Emilyfoto Co., Ltd.verified🇨🇳CN7 yrs
XPimage Speed Booster 0.71x Locking Focal Reducer Aluminum Alloy Full Frame Optics Adapter for Mamiya 645 Lens for E Mount
Shenzhen Huidou Technology Co., Ltd.🇨🇳CN4 yrs
Focal Reducer Booster Adapter Auto-focus 0.71x Viltrox EF-M2 Adapter Lens Adapter for Canon EF Mount Lens to M43 Camera Gh5 Gh4
VILTROX EF EOS M II Speed Booster Focal Reducer Lens Adapter for Canon EF S Lens to EOS M Mount M50 Mirrorless Camera AF
Shenzhen Sunji Technology Co., Ltd.🇨🇳CN1 yr
Lens Adapter EF-M II 0.71x Speed Booster for EF Lens to EF-M Mirrorless Camera M50 AF Auto Focal Reducer
Shenzhen Hongtu Zhanfei Technology Co., Ltd.🇨🇳CN7 yrs
VILTROX EF-M2II Auto-Focus 0.71x Speed Micro 4/3 Focal Reducer Booster Camera Lens Mount Adapter for Canon EF Mount Series Lens
Guangzhou Jingying Information Technology Co., Ltd.🇨🇳CN9 yrs
Viltrox EF-M2 II Auto Focus 0.71x Speed Booster Adapter for Canon EF Lens to M43 MTF Camera Panas Onic Olympus GH6 GH5 BMCC 4K
NEEWER EF-EOS M Series Lens Mount Adapter 0.71x Autofocus Speed Booster Compatible for Lens
Shenzhen Shixin Trading Co., Ltd.🇨🇳CN5 yrs
DF Wholesale Viltrox EF-M2 II Speed Booster 0.71x AF Adapter for EF to MFT/M4/3 Multi-Material Non-Full Frame
Guangzhou Benmingming Technology Development Co., Ltd.🇨🇳CN5 yrs
Viltrox Ef-m2 Focal Reducer Booster Adapter Auto-focus 0.71x For Ef Mount Lens To M43 Camera Gh5 Gh4 Gf7gk Gx7 E-m5 Ii M10
CM- EF-FX Booster Commlite Electronic AF Lens Mount Adapter From EF Lens to EOSM Camera
Shenzhen Commlite Technology Co., Ltd.🇨🇳CN13 yrsDeep Dive · Full Report
Full Market Report
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Sources & References
49 sources cited · Verified industry data & reports
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r/canon on Reddit: Speedbooster for RF-EF
www.reddit.com
Is it impossible to do a Speedbooster RF to RF or just non profitable? ... EF to EF speed booster? I've seen speed boosters back and forth from different mounts but never an ef to ef am I missing something? ... Looking for a new RF lens to replace my trusty EF. ... Am I crazy? Not loving the RF 24-70 2.8. ... Reddit, Inc. © 2026. Searching for Canon speedbooster brings of tons of 3rd party EFM-EF speedboosters for reasonable prices, however the only result for RF-EF is the Metabones for $500. There is a Canon brand EF-RF speedbooster/focal reducer, a Viltrox, a Meike, a Metabones, and I think Fotodiox and Commlite may have them as well. Posted by u/rk5n - 3 votes and 11 comments
r/canon on Reddit: Speedbooster for EF-S to RF
www.reddit.com
I've seen speed boosters back and forth from different mounts but never an ef to ef am I missing something? ... HELP! RF Videographers. Deciding on zoom lens 24-105 f4 or 28-70 f2.8? ... [S][USA-MD] Tamron 35-150 f2-f2.8, Peak Design Everyday Sling 6L, Peak Design Everyday Messenger V1. ... Reddit, Inc. © 2026. I know I can mount the EF-S lenses on the R8 with the EF-RF adapter, but the camera will automatically apply a crop of 1.6 and hence, I'll loose out on resolution (~10 MP vs. the 24.2 MP I'd get with an EF/RF lens). Is there a speedbooster available that'll let me get the full resolution out of these APS-C lenses? Now I just need to sell off the EF-S glass to recover some cash for filters, hoods, a cleaning kit, and probably a new bag😅😅. ... A speedbooster or focal reducer as it's otherwise called, takes a lens that projects a larger image circle and focus it down to fit a smaller sensor, increasing your light-gathering, hence the name speed*booster* Posted by u/Phantom_47 - 3 votes and 11 comments