Canon EF 180mm f3.5L Macro USM - Manual (Page 13)

ENG-12
• First attach the Extender to the lens, then attach the lens to the camera. Detach it from the
camera in the reverse order. If you attach the lens to the camera first, misoperation may
occur.
• With the EF1.4X II Extender attached, autofocusing is enabled from 0.8 m/2.6 ft. to infinity.
Autofocus mode cannot be used to take pictures closer than 0.8 m/2.6 ft. due to the relation
with the effective F value, so use manual focusing.
• If you use an Extender on the lens mounted on a EOS A2/A2E/5, set the exposure
compensation to -1/2 stop for the EF1.4X ll or -1 stop for the EF2X ll.
• Only one Extender can be attached to the lens and camera.
13. Extenders
(Sold separately)
With Extender EF1.4X ll or EF2X ll attached, the lens specifications will change as follows:
Item With EF1.4X ll Extender With EF2X ll Extender
Focal length (mm) 252 360
Aperture
in stops f/5 – 45 f/7.1 – 64
in stops f/4.5 – 45 f/6.7 – 64
Diagonal 9°50’ 6°50’
Angle of view Vertical 5°30’ 3°50’
Horizontal 8°10’ 5°40’
Maximum magnification (
×)
1.4 2.0
1
2
1
3
COP
Y