Surf Wiki
Save to docs
general/canon-ef-lenses

From Surf Wiki (app.surf) — the open knowledge base

Canon Extender EF

Group of teleconverter lenses made by Canon

Canon Extender EF
Summary

Group of teleconverter lenses made by Canon

The Canon Extender EF 1.4x II
Image of the Canon 2x III Extender

The Canon Extender EF lenses are a group of teleconverter lenses made by Canon. These lenses are used between any compatible EF type lens and any of the Canon EOS line of cameras. When used with a compatible lens, they will multiply the focal length of the lens by a factor of either 1.4x or 2x, at the cost of decreasing the lens' aperture by 1 or 2 stops respectively. For example, using a 1.4x or 2x extender with the Canon EF 500mm f/4L IS USM would result in a 700mm f/5.6 or 1000mm f/8 lens.

Overview

Canon has released six models:

  • 1.4x (1988)
  • 1.4x II{{cite web |access-date=2008-01-11 |author-link=Canon (company) |archive-url=https://web.archive.org/web/20071227165406/http://www.canon.com/camera-museum/camera/lens/ef/data/extender/ex_ef1_4xii.html |archive-date=2007-12-27 |url-status=dead
  • 1.4x III (2010)
  • 2x (1987)
  • 2x II{{cite web |access-date=2008-01-11 |author-link=Canon (company) |archive-url=https://web.archive.org/web/20080101142209/http://www.canon.com/camera-museum/camera/lens/ef/data/extender/ex_ef2xii.html |archive-date=2008-01-01 |url-status=dead
  • 2x III (2010)

Technical information

The extenders are constructed with metal bayonets, and engineered plastic ends. There are no moving parts, other than the lens latch lock. Three generations of the extenders exist: the older 1.4× and 2×, the 1.4× II and 2× II, and the 1.4× III and 2.0× III. The II versions have weather-sealing and anti-reflective surfaces inside the extender body. The optical construction of the 1.4× versions are of a five-element design. Both 2× versions use seven elements, although the optical formula of the II version is different to improve optical performance. The III versions of the extenders have improved autofocus performance as well increased image quality over the II, and their front and rear elements are coated with fluorine anti-smear coating to be easier to clean.

Compatibility information

70-200mm f/2.8 IS]] on the right.
300mm f/2.8 IS lens, no extender
300mm f/2.8 IS lens, 1.4× extender
300mm f/2.8 IS lens, 2.0× extender

These Extender EF lenses can only be used with lenses that have a compatible mount. While all EF lenses have mount designs that can be used with EOS bodies, only lenses with accordant mounts can be used with the extender EF lenses. These lenses must have the clearance to accept the protruding lens on the extender, as well as 10 (3 extra) electronic contacts for proper electronic communication with the extender. These extra electronic contacts are used for sending the correct aperture information to the body.

When a compatible lens is used with a 1.4× or 2× extender, it will cost the lens a one or two stop decline in aperture size, respectively. Autofocus speed of any used EF lens is also affected. When used with the 1.4× extender, autofocus speed is reduced by 50%. When used with the 2× extender, autofocus speed is reduced by 75%. Image stabilization may not work on lenses that are equipped with an extender, or on certain EOS bodies.

Some EOS bodies are unable to autofocus when the maximum aperture of a lens is smaller than f/5.6. Professional-level bodies are capable of autofocusing lenses with a maximum aperture of f/8, but only with the centre autofocus point. With a 2× extender a 400mm f/4 lens would have an equivalent focal length of 800mm and a maximum aperture of f/8, in which case autofocus would only be available with professional bodies. With the same converter a 400mm f/5.6 lens would have a maximum aperture of f/11 and autofocus would be disabled.

Though not specified by Canon as such, users have reported that the tilt-shift lenses in Canon's line-up can also be used with the extenders.{{cite web |access-date=2008-10-06 |access-date=2008-10-06 |access-date=2008-10-06

List of compatible EF lenses

The following is a list of EF lenses that are compatible with the Extender EF lenses together with their resulting focal lengths, and apertures. Also listed is the autofocus and image stabilization functionality.

LensLens with 1.4×AF with 1.4×IS with 1.4×Lens with 2×AF with 2×IS with 2×Key
135 mm 2L USM190 mm 2.8[[File:Yes check.svg15pxYes]]—270 mm 4[[File:Yes check.svg15pxYes]]—
180 mm 3.5L Macro USM252 mm 5[[File:Yes check.svg15pxYes]]—360 mm 7.1[[File:X mark.svg15pxNo]]—
200 mm 1.8L USM280 mm 2.5[[File:Yes check.svg15pxYes]]—400 mm 3.5[[File:Yes check.svg15pxYes]]—
200 mm 2.0L IS USM280 mm 2.8[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]400 mm 4[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]
200 mm 2.8L II USM280 mm 4[[File:Yes check.svg15pxYes]]—400 mm 5.6[[File:Yes check.svg15pxYes]]—
300 mm 2.8L USM420 mm 4[[File:Yes check.svg15pxYes]]—600 mm 5.6[[File:Yes check.svg15pxYes]]—
300 mm 2.8L IS USM420 mm 4[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]600 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]
300 mm 4L USM420 mm 5.6[[File:Yes check.svg15pxYes]]—600 mm 8[[File:Gold check mark.svg15pxMaybe]]—
300 mm 4L IS USM420 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]600 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
400 mm 2.8L USM560 mm 4[[File:Yes check.svg15pxYes]]—800 mm 5.6[[File:Yes check.svg15pxYes]]—
400 mm 2.8L II USM560 mm 4[[File:Yes check.svg15pxYes]]—800 mm 5.6[[File:Yes check.svg15pxYes]]—
400 mm 2.8L IS USM560 mm 4[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]800 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]
400 mm 4 IS DO USM560 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]800 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
400 mm 4 DO IS II USM560 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]800 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
400 mm 5.6L USM560 mm 8[[File:Gold check mark.svg15pxMaybe]]—800 mm 11[[File:X mark.svg15pxNo]]—
500 mm 4L IS USM700 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]1000 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
500 mm 4.5L USM700 mm 6.3[[File:Gold check mark.svg15pxMaybe]]—1000 mm 9.0[[File:X mark.svg15pxNo]]—
600 mm 4L USM840 mm 5.6[[File:Yes check.svg15pxYes]]—1200 mm 8[[File:Gold check mark.svg15pxMaybe]]—
600 mm 4L IS USM840 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]1200 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
800 mm 5.6L IS USM1120 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]1600 mm 11[[File:X mark.svg15pxNo]][[File:Gold check mark.svg15pxMaybe]]
1200 mm 5.6L USM1680 mm 8[[File:Gold check mark.svg15pxMaybe]]—2400 mm 11[[File:X mark.svg15pxNo]]—
70–200 mm 2.8L IS USM98–280 mm 4[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]140–400 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]
70–200 mm 2.8L IS II USM98–280 mm 4[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]140–400 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]
70–200 mm 2.8L USM98–280 mm 4[[File:Yes check.svg15pxYes]]—140–400 mm 5.6[[File:Yes check.svg15pxYes]]—
70–200 mm 4L IS USM98–280 mm 5.6[[File:Yes check.svg15pxYes]][[File:Yes check.svg15pxYes]]140–400 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
70–200 mm 4L USM98–280 mm 5.6[[File:Yes check.svg15pxYes]]—140–400 mm 8[[File:Gold check mark.svg15pxMaybe]]—
100–400 mm 4.5–5.6L IS USM140–560 mm 6.3–8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]200–800 mm 9–11[[File:X mark.svg15pxNo]][[File:Gold check mark.svg15pxMaybe]]
100–400 mm 4.5–5.6L IS II USM140–560 mm 6.3–8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]200–800 mm 9–11[[File:X mark.svg15pxNo]][[File:Gold check mark.svg15pxMaybe]]
200–400 mm 4L IS USM
(without built-in extender 1.4×)280–560 mm 5.6[[File:Yes check.svg15pxYes]][[File:Gold check mark.svg15pxMaybe]]400–800 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]
200–400 mm 4L IS USM
(with built-in extender 1.4×)400–800 mm 8[[File:Gold check mark.svg15pxMaybe]][[File:Gold check mark.svg15pxMaybe]]560–1120 mm 11[[File:X mark.svg15pxNo]][[File:Gold check mark.svg15pxMaybe]]
TS-E 17 mm 4L24 mm 5.6[[File:X mark.svg15pxNo]]—34 mm 8[[File:X mark.svg15pxNo]]—
TS-E 24 mm 3.5L35 mm 5.0[[File:X mark.svg15pxNo]]—50 mm 7.1[[File:X mark.svg15pxNo]]—
TS-E 45 mm 2.865 mm 4.0[[File:X mark.svg15pxNo]]—90 mm 5.6[[File:X mark.svg15pxNo]]—
TS-E 90 mm 2.8125 mm 4.0[[File:X mark.svg15pxNo]]—180 mm 5.6[[File:X mark.svg15pxNo]]—
Autofocus:[[File:Yes check.svg15pxYes]] - AF works. [[File:Gold check mark.svg15pxMaybe]] - AF works only with EOS bodies that can AF at 8. [[File:X mark.svg15pxNo]] - AF does not work.
Image stabilization:[[File:Yes check.svg15pxYes]] - IS works. [[File:Gold check mark.svg15pxMaybe]] - IS works only with supported EOS bodies (generally, bodies introduced since approximately 1995).

List of EOS bodies that can AF at {{f/}}8

Canon EOS bodies that have a high density, high precision auto-focus sensor with 45 or more AF points are able to autofocus at maximum apertures of 8.{{cite web |access-date=2010-01-01 |author-link=Canon (company) |archive-date=2009-12-30 |archive-url=https://web.archive.org/web/20091230114042/http://cpn.canon-europe.com/content/education/infobank/lenses/extenders.do |url-status=dead

  • Canon EOS-1D X Mark II
  • Canon EOS-1D X Mark III
  • Canon EOS-1D X (with firmware version 1.1.1)
  • Canon EOS 5D Mark III (with firmware version 1.2.1)
  • Canon EOS 5DS
  • Canon EOS 5DS R
  • Canon EOS 5D Mark IV
  • Canon EOS 6D Mark II
  • Canon EOS 7D Mark II
  • Canon EOS 80D
  • Canon EOS 77D
  • Canon EOS 90D
  • Canon EOS 800D/Rebel T7i
  • Canon EOS 850D/Rebel T8i
  • Canon EOS-1D Mark IV
  • Canon EOS-1Ds Mark III
  • Canon EOS-1D Mark III
  • Canon EOS-1Ds Mark II
  • Canon EOS-1D Mark II
  • Canon EOS-1D Mark II N
  • Canon EOS-1Ds
  • Canon EOS-1D
  • Canon EOS-1V
  • Canon EOS 3

Dual Pixel CMOS AF at {{f/}}11

Canon EOS bodies that have Dual Pixel CMOS AF like the 70D and later models support autofocusing in Liveview mode, with maximum apertures as small as f/11.

Notes

Citations

Sources

References

  1. "Technical Hall - Technical report 2001.9". Canon.com.
  2. (2011-01-31). "Canon EF 1.4x III Extender Review". The-digital-picture.com.
  3. "Canon Europe: Infobank - Extenders".
  4. (October 23, 2012). "The EOS-1D X & f/8". Canon UK.
  5. . (October 2012). ["EOS 5D Mark III firmware update"](http://cpn.canon-europe.com/content/news/eos_5d_mark_iii_firmware_update.do). *canon*.
  6. . (May 2015). ["EOS 5DS/EOS 5DS R Bedienungsanleitung"](http://gdlp01.c-wss.com/gds/5/0300019155/01/EOS_5DS_EOS_5DS_R_Instruction_Manual_DE.pdf). *Canon de*.
  7. (September 2013). "Canon EOS 7D Mark II - Autofocus & Metering". [[Digital Photography Review]].
  8. (2011-01-31). "Canon Dual Pixel CMOS AF: Autofocus secrets of the Canon 70D explained". Imaging-Resource.com.
  9. The aperture is for bodies using 1/3-step displays.
  10. Autofocus range is reduced from 0.48 m–infinity to 0.8 m–infinity.
  11. Autofocus is possible using only the center AF point.
  12. TS-E lenses are not equipped with an autofocus motor.
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

canon-ef-lenses teleconverter-lenses
Want to explore this topic further?

Ask Mako anything about Canon Extender EF — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report