Canon EF 8-15 mm f/ 4 L USM Fisheye Lens Technical Manual (en)

Download
ENG-14
• Autofocusing is still enabled with Extender EF1.4X II/EF2X ll attached.
• When an Extender is attached, the AF speed will become slower by design to retain proper
AF control.
• 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.
• Only one Extender can be attached to the lens and camera.
• 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.
14. 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)
98 – 280
140 – 400
Aperture
f/4 – 45
f/5.6 – 64
Diagonal
25°20’ – 8°50’
16°20’ – 6°10’
Angle of view
Vertical
13°50’ – 4°55’
9°10’ – 3°30’
Horizontal
20°50’ – 7°20’
13°40’ – 5°10’
Maximum magnification (
×)
0.30
0.44