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Canon EF 400mm f/4 DO IS USM Lens

BH #CA4004ISEF • MFR #7034A002
Canon EF 400mm f/4 DO IS USM Lens
Key Features
  • EF Mount Lens
  • Aperture Range: f/4-32
  • Multi-Layer Diffractive Optical Element
  • Two-Mode Image Stabilization System
The EF 400mm f/4 DO IS USM Lens from Canon utilizes multi-layer diffractive optical (DO) lens technology to correct chromatic aberrations, substantially reduce lens size and provide excellent overall telephoto image quality. This offers an alternative for sports, nature and wildlife photographers, giving exemplary results in a size previously unheard of for a lens of such a focal length and aperture.
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question

Hi, what is the model of the tripod ring i need for this lens? I am buying one used and it doesn't come with tripod ring. Thank you
Asked by: Anonymous
You will need to contact the manufacturer directly for a tripod collar replacement for this lens.
Answered by: Heather S.
Date published: 2018-08-27

question

Does this lens have autofocus with the EF 2x III extender?
Asked by: Anonymous
When using the 400mm f/4 with the 2X III Extender, you will retain autofocus with the 1D series and the 5D III with the newer firmware. With all other cameras, autofocus will be lost.
Answered by: Christina S.
Date published: 2018-08-27

question

this lens works automatic focus with the Canon Extender EF 1.4X IIIThanks Fernando
Asked by: Anonymous
You can retain autofocus using the EF 400mm f/4 DO IS USM Lens with the Canon EF 1.4X III extender, yes.
Answered by: Christina S.
Date published: 2018-08-27
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