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Canon 100-400mm f/5.6-8

The Canon RF 100-400mm f/5.6-8 IS USM is a telephoto zoom lens designed for Canon's RF mirrorless mount, aimed at wildlife, sports and aviation shooters who need long reach in a compact, lightweight package. Its variable f/5.6-8 maximum aperture keeps the optic small and affordable relative to professional super-telephotos, while the built-in IS and USM autofocus motor make it well suited to handheld use on EOS R-series bodies.

Sales data is extremely thin: a single UK auction hammer result of £350 from October 2023 is the only datapoint available, so a meaningful price range or median cannot yet be established. As of today in 2026 that figure suggests the lens sells for noticeably less at saleroom level than current retail, but with only one verified result the wider value picture remains uncertain and buyers should treat it as indicative rather than definitive. Hammer prices exclude buyer's and seller's commission, so the true cost to a winning bidder is higher than the headline figure.

Variants

Select a variant to filter the sales history below.

Variant Years Edition Sales Price Range
RF IS USM — — 8 £209 – £512
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Sales History

Prices shown are realised prices — auction results and completed eBay sales, never asking prices. Most saleroom figures are hammer prices, before commission; some houses publish a premium-inclusive figure, and we do not adjust for condition. Dealer and retail asking prices are typically higher. How this figure is calculated.

Prices updated: August 2026

Date Price Value GBP Source Variant
Aug 2026 £440 £440 🇬🇧 eBay RF IS USM
Aug 2026 £505 £505 🇬🇧 eBay RF IS USM
Aug 2026 USD 685 £512 🇺🇸 eBay RF IS USM
Aug 2026 USD 612 £458 🇺🇸 eBay RF IS USM
Aug 2026 USD 280 £209 🇺🇸 eBay RF IS USM
Aug 2026 USD 600 £449 🇺🇸 eBay RF IS USM
Aug 2026 USD 575 £430 🇺🇸 eBay RF IS USM
Oct 2023 £350 £350 🇬🇧 Special Auction Services RF IS USM
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Frequently asked questions

How much is a Canon RF 100-400mm f/5.6-8 IS USM worth at UK auction?

The only recorded UK auction hammer price in our data is £350 from October 2023, so that is the single reference point for what this lens has sold for at saleroom level.

What is a Canon RF 100-400mm f/5.6-8 IS USM worth used today?

With just one verified sale at £350, a precise current value cannot be pinned down, but that result indicates used auction prices sit well below new retail.

What should I check before buying one second-hand?

Inspect the glass for fungus, haze and coating scratches, confirm smooth zoom and focus action, and test that IS and USM autofocus operate quietly and accurately on an RF-mount body.

Does the RF 100-400mm f/5.6-8 IS USM fit older Canon DSLRs?

No — it uses the RF mount introduced for Canon's mirrorless EOS R series and is not natively compatible with EF-mount DSLRs.

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