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ENG-19
16. Extenders (Sold Separately)
Lens specifications when using extender EF1.4× II/III or EF2× II/III are as follows.
EF300mm f/2.8L IS II USM EF400mm f/2.8L IS II USM
EF1.4× II/III EF2× II/III EF1.4× II/III EF2× II/III
Focal length (mm) 420 600 560 800
Aperture f/4 – 45 f/5.6 – 64 f/4 – 45 f/5.6 – 64
Angle of view
Diagonal 5° 55’ 4° 10’ 4° 25’ 3° 5’
Vertical 3° 15’ 2° 20’ 2° 25’ 1° 40’
Horizontal 4° 55’ 3° 30’ 3° 40’ 2° 35’
Maximum magnification (×) 0.25 0.36 0.25 0.35
Attach the extender to the lens, and then attach the lens to the camera. To remove it, reverse the order.
Errors may occur if you attach the extender to the camera first.
When shooting with EOS A2/A2E/5 fitted with either the EF300mm f/2.8L IS II USM or EF400mm f/2.8L IS
II USM, use –0.5 step exposure compensation when using extender EF1.4× II, and use –1 step exposure
when using extender EF2× II.
Extenders cannot be used more than one at a time.
AF is possible with extender EF1.4× II/III or EF2× II/III.
When an extender is attached, the AF speed will become slower to retain proper control.
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