Used Canon EF Extender 1.4x III
£249 The only one we have
Condition report
Checked in HarrogateLittle or no sign of use. Optics and sensor clean.
Our notes: Virtually no signs of use, mint
How we grade
- Like new
- Little or no sign of use. Optics and sensor clean.
- Excellent
- Light signs of careful use, only visible up close. Optics and sensor clean.
- Very good
- Some light marks or wear from normal use. Nothing that affects how it works or its pictures.
- Good
- Clearly used, with visible wear. Works properly and takes good pictures.
- Fair
- Heavy signs of use, or a flaw described in our notes. Fully working, priced to match.
Every item graded Fair or above is fully working and tested in our Harrogate shop. Any haze, fungus or marks on the glass are always written in the notes, and cap the grade at Fair.
- Testing
- Fully tested
- Warranty
- 6 months
- In the box
- Boxed complete with front/rear caps & pouch
Order by 2pm for same-day dispatch
Insured UK delivery £5.99, or collect free from our Harrogate shop
Hassle-free returns
Open Mon–Sat, 9:30am–5pm
Questions about this one?
Ask the people who tested it. We’ll check any detail or send extra photos before you buy.
- 4.9 on GoogleFrom 137 reviews
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60+ yearsIndependent, in Harrogate
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Warranty includedUp to 12 months
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Secure checkoutPayments by Shopify
The details
At a glance: EF 1.4x III teleconverter - extends compatible L-series telephotos by 1.4x, weather-sealed, 1-stop loss.
About this lens
The Canon EF Extender 1.4x III is Canon's professional-grade 1.4x teleconverter, released in 2010. Multiplies the focal length of compatible L-series lenses by 1.4x with one stop of aperture loss. Weather-sealed and optimised for modern super-telephoto L-series optics.
Build & handling
| Magnification | 1.4x |
|---|---|
| Aperture loss | 1 stop |
| Autofocus | Preserved with compatible lenses |
| Minimum aperture supported | f/4 or wider becomes f/5.6 or wider |
| Weight | 225g |
| Construction | Weather-sealed, fluorine-coated rear element |
Works with
- Canon L-series telephoto lenses only (see Canon compatibility chart)
- Works on Canon EF-mount full-frame and APS-C DSLRs
- Works on Canon RF mirrorless bodies via EF-EOS R adapter (stacked with the converter)
Best for
A pro-grade teleconverter for extending the reach of compatible Canon L-series telephoto lenses - typically the 70-200mm f/2.8L, 300mm f/2.8L and 400mm f/2.8L-class primes. Adds roughly 40% more focal length at the cost of one stop of aperture. Not all Canon EF lenses are compatible - check Canon's compatibility chart before purchase.
Frequently asked questions
Which lenses is this compatible with?
Only specific Canon L-series telephoto lenses - primarily the 70-200mm f/2.8L IS, 300mm f/2.8L IS, 400mm f/2.8L IS, 500mm f/4L IS, 600mm f/4L IS, and 800mm f/5.6L IS families. It will not fit or function correctly with shorter L-series lenses, non-L lenses, or EF-S lenses.
What's the difference between the Mk II and Mk III?
The Mk III (2010) adds weather-sealing, improved optical coatings, and re-optimised correction for current-generation L-series telephotos. The Mk II remains optically capable on older lenses.
Will it work on Canon RF mirrorless bodies?
Yes, via the Canon EF-EOS R adapter. Autofocus and IS are preserved, and the lens functions normally on R, R5, R6, R7, R8, R50 and other RF bodies.
Why buy from Bass & Bligh
Bought from a real shop, not a warehouse.
Dispatched on the Monday… great service
Ordered a Panasonic four thirds lens dispatched on the Monday after purchase and delivered on the following Tuesday great service. Tried on the camera and initial thoughts are wow pin sharp and clear photos. Thank you
George P.Ordered a lens onlineA proper little treasure trove
3rd time I've been to this shop to treat myself to some new kit. Always very friendly and knowledgeable. Fairly priced too. I would highly recommend a visit if your nearby and looking for camera gear. I'd say if they don't have what your looking for, it's probably not possible to find anywhere. It's a proper little treasure trove.
Philip B.Third visit to the shopBrilliant advice with awesome customer service
Sure you can buy online and possibly save a few pounds.. but if you require and appreciate knowledge and brilliant advice with awesome customer service then it's a no brainer...This is a real camera shop like it used to be back int day..
Malcolm S.