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- Canon 2x EF II Teleconverter (Extender) 15 day/60 week/120 month
Product Description
Warning!!! This extender will not work with every lens. See chart below for compatibility. You will lose 2 f/stops using this extender!
Overview--
This extender has been re-designed optically and offers excellent performance with compatible EF lenses (same as the Extender EF 1.4x II). Features a new seven-element design, and same weather-resistant design and anti-reflection internal construction as the new EF 1.4x II. The EF 2x II doubles the focal length of any lens it's mounted to, and reduces its effective aperture by two stops. With the EF 2x II, AF is possible with any EOS body if the lens has an f/2.8 or faster maximum aperture, and compatible Image Stabilization lenses maintain the IS feature when used with any current EOS camera.
Specifications
Main Unit Spec
| Focal Length & Maximum Aperture | Magnification: 2.0x |
| Lens Construction | 7 elements in 5 groups |
| Max. Diameter x Length, Weight | 2.8" x 2.3", 9.3 oz. / 71.8 x 57.9mm, 265g |
| Extender EF 2x Compatibility Chart | ||||
|
Lens Attachment
|
Focal Length
(mm) |
f-stop
(f) |
Max. Magnification
(x) |
AF
|
|
EF 135mm f/2L USM
|
270
|
4 ~ 64
|
0.38
|
O
|
|
EF 180mm f/3.5L Macro USM
|
360
|
6.7*1 ~ 64
|
2.0
|
X
|
|
EF 200mm f/1.8L USM
|
400
|
3.5 ~ 45
|
0.18
|
O
|
|
EF 200mm f/2L IS USM
|
400
|
5.6 ~ 64
|
0.24
|
O*4
|
|
EF 200mm f/2.8L II USM
|
400
|
5.6 ~ 64
|
0.32
|
O
|
|
EF 300mm f/2.8L IS USM
|
600
|
5.6 ~ 64
|
0.28
|
O
|
|
EF 300mm f/4L IS USM
|
600
|
8 ~ 64
|
0.47
|
X*4*5
|
|
EF 400mm f/2.8L IS USM
|
800
|
5.6 ~ 64
|
0.31
|
O
|
|
EF 400mm f/4L DO IS USM
|
800
|
8 ~ 64
|
0.24
|
X*4*5
|
|
EF 400mm f/5.6L USM
|
800
|
11 ~ 64
|
0.18
|
X
|
|
EF 500mm f/4L IS USM
|
1,000
|
8 ~ 90
|
0.25
|
X*4*5
|
|
EF 600mm f/4L IS USM
|
1,200
|
8 ~ 90
|
0.24
|
X*4*5
|
|
EF 800mm f/5.6L IS USM
|
1,600
|
11 ~ 64
|
0.28
|
X
|
|
EF 1200mm f/5.6L USM
|
2,400
|
11 ~ 64
|
0.18
|
X
|
|
EF 70-200mm f/2.8L USM
|
140 ~ 400
|
5.6 ~ 64
|
0.33
|
O*2
|
|
EF 70-200mm f/2.8L IS USM
|
140 ~ 400
|
5.6 ~ 64
|
0.33
|
O*2
|
|
EF 70-200mm f/2.8L IS II USM
|
140 ~ 400
|
5.6 ~ 64
|
0.33
|
O*2
|
|
EF 70-200mm f/4L USM
|
140 ~ 400
|
8 ~ 64
|
0.45
|
X*4
|
|
EF 70-200mm f/4L IS USM
|
140 ~ 400
|
8 ~ 64
|
0.45
|
X*4
|
|
EF 100-400mm f/4.5-5.6L IS USM
|
200 ~ 800
|
9.5 ~ 64
|
0.41
|
X*5
|
- Teleconverters work very well with f/4 or f/2.8 telephoto prime lenses (300, 400, 500, 600), especially mounted on a tripod.
- Teleconverters work acceptably on high quality zoom lenses with maximum apertures of f/2.8 or f/4.
- Teleconverters don’t work well with consumer (f/5.6 zooms), medium range zooms, or wide angle lenses. Most manufacturer’s teleconverters won’t even mount to such lenses.
- Third party (Sigma, Kenko) teleconverters will mount to other lenses that the manufacturer’s teleconverters won’t mount to.
- Third party teleconverters don’t ‘report’ electronically to the camera body and may ‘fool’ the body into trying to autofocus when it shouldn’t. Results are pretty variable (often poor).
