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Canon Extension Tube EF 12 II

BH #CAETEF12Q • MFR #9198A001
458 reviews
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Canon Extension Tube EF 12 II
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Canon Extension Tube EF II Overview

The result of using extension tubes is that the distance from the back of the lens to the film surface is longer, which means you can take photographs at shorter distances to the subject. Extension tubes are thus commonly used for macro photography and sometimes for closeup portraits.

When using the camera's TTL metering system, no exposure compensation will be required (exposure compensation is required for handheld meters).

This updated version II is now also fully compatible with Canon Digital EF-S lenses, as well as standard photo EF and TS-E lenses.

Extension Tube EF 12 II is especially suited for close-focusing with wide-angle lenses. Compatible with all lenses, except 15mm f/2.8 fisheye, 14mm f/2.8L and MP-E 65mm f/2.8.

Shortens focusing distance of lens
Compatible with digital EF-S lenses, as well as EF and TS-E lenses
White-index mark provided for digital SLR EF-S lenses
Red mark provided for photo lenses
UPC: 013803035599

Canon Extension Tube EF II Specs

Mount
Canon EF
Length
12 mm
Packaging Info
Package Weight
0.32 lb
Box Dimensions (LxWxH)
3 x 3 x 3"

Canon Extension Tube EF II Reviews

EF 12 II and extenders

By Gregg
Rated 5 out of 5
Date: 2025-02-11

Like some others perhaps, I wondered if it would be possible to use this extension tube as a means for stacking Canon teleconverters. After purchasing the EF 12 II from B&H, I tried this out with a pair of 2x III Canon EF extenders on my older EF 500mm f/4 IS USM lens. Put simply, it worked. I also stacked it between a 2x III and 1.4x III as well (giving me a 1400mm reach at about f/12). This worked fine on my three different bodies (5D3, 5D4 and 5Dsr). With both 2x extenders, this is the full frame view at 2000mm of a waxing gibbous e moon, at what I assume to be f/16. The stacking information did not register in the IPTC data however, which only recorded one extender and a 1000mm focal length. The settings for the image, recorded at 6:21pm on Feb. 10, 2025, were: 1/2000 at 2500 ISO on a Canon 5D4, and f/16, along with image stabilization (IS). The overall quality was better than expected. I've used it to photograph wildlife during the daytime as well but with manual focus only, as you might imagine, that is a bit of a chore. I put the lens and extenders on a Gitzo monopod but a tripod is really your best option. So although it's not advertised for this kind of use, you can indeed use this in between extenders for longer reach. The kind of photography you can do of course is limited. For lunar landscapes or any other subject that's not moving quickly, it's a good option for those without the deep pockets to afford Canon's pricier 1200mm lenses.

Good quality,

By Braden
Rated 5 out of 5
Date: 2023-02-10

After some trial and error I finally got this beauty to work works perfectly on the sigma 105 macro 2.8 Definitely had an issue with my 70-300 4-5.6L would not focus til I was at 300mm

See any errors on this page?

More specifically, will an extension tube make my ...

More specifically, will an extension tube make my fisheye lens wider?
Asked by: Tanner
An extension tube such as this would only short the focusing distance of a lens and would not change the focal length.
Answered by: Kirk R
Date published: 2020-04-07

Will this add some vignetting to my rokinon 8mm ...

Will this add some vignetting to my rokinon 8mm fisheye?
Asked by: Tanner
I only use the extension tube with Canon lenses at or above 50 mm of focal length. With an 8 mm lens the vignetting is almost guaranteed.
Answered by: Giordano
Date published: 2020-04-07

question

Is this extension tube compatible with Canon's 40mm pancake lens?
Asked by: Anonymous
Yes, the Canon Tube EF 12 II is fully compatible with the 40mm pancake lens.
Answered by: Yos O.
Date published: 2018-08-27

question

How is this extension going to affect my 24-105 f4, mounted on a 5D mk II? I will be doing jewelry photography and trying to figure out if I need to invest in a macro lens vs modifying the one mentioned above. Thank you! Still figuring it all out, I hope the question makes sense :)
Asked by: Anonymous
I'm afraid I have only used the extension tubes with macro lenses and the effect was to increase the magnification. I'm not sure if that will be the same effect for non-macro lenses.
Answered by: Dereck D.
Date published: 2018-08-27

question

Can I use this extension tube with a Sigma 17-50mm F2.8 EX DC OS HSM on full frame a DSLR without a vinaigrette effect?
Asked by: Anonymous
Technically you could mount the extension tube between the APS-C format lens you have and your full-frame camera, however we do no regularly encourage this combination as it will cause vignetting and will not be useful with the lens you mentioned above.
Answered by: Yos O.
Date published: 2018-08-27

question

i recently purchase a efs10-22mm and thinking about adding Extension Tube EF 12 II would this extension allow less light in and what effect good or bad will it have on images?
Asked by: Don M.
You would not lose much light using the Canon Extension Tube EF 12 II on the Canon 10-22mm f/3.5-4.5 EF-S USM lens. The effect the extension tube would have on your image is you would lose infinity focus, however, it would allow you to focus closer on your subject for higher magnification for macro or close-up photography needs.
Answered by: Manzell L.
Date published: 2018-08-27

Can I use this Canon Extension Tube EF 12 II with ...

Can I use this Canon Extension Tube EF 12 II with Canon EF-S 18-135mm f/3.5-5.6 IS USM lens for Blackmagic Production Camera 4K?
Asked by: Thavisouk
Yes. It is fully compatible with the lens mount on camera and lens.
Answered by: Steve
Date published: 2019-12-24

question

is this extension work with my canon 60d and lens 18-200 ?
Asked by: Anonymous
The Canon Extension Tube EF 12 II is compatible with both the Canon 60D and the EF-S 18-200mm lens.
Answered by: Christina S.
Date published: 2018-08-27
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