Canon EF 300mm f/2.8L IS USM EF300mm F2.8L IS USM Instruction Manual - Page 19

Extenders (Sold Separately) ● When shooting with EOS A2/A2E/5 fitted with either the EF300mm f/2.8L IS USM or EF400mm f/2.8L IS USM, use -0.5 step exposure compensation when using extender EF1.4× II, and use -1 step exposure when using extender EF2× II. ● When taking pictures on an EOS A2/A2E/5 using an EF1.4× II/EF2× II extender with the EF500mm f/4L IS USM or the EF600mm f/4L IS USM, use the values in the table below for exposure compensation. Evaluative metering Center-weighted average metering Spot metering EF1.4× II -0.5 step -0.5 step - EF2× II -1 step -1 step -0.5 step ● Extenders cannot be used more than one at a time. ● AF is possible with extender EF1.4× II. ● When an extender is attached, the AF speed will become slower to retain proper control. 15. Extension Tubes (Sold Separately) You can attach extension tube EF12 II or EF25 II for magnified shots. The shooting distance and magnification are shown below. Focusing Distance Range (mm) Magnification (×) Close distance Long distance Close distance Long distance EF300mm f/2.8L IS USM EF12 II 2016 7561 0.18 0.04 EF25 II 1687 3731 0.24 0.09 EF400mm f/2.8L IS USM EF12 II 2602 13633 0.19 0.03 EF25 II 2314 6974 0.23 0.06 EF500mm f/4L IS USM EF12 II 3856 21193 0.15 0.03 EF25 II 3391 10778 0.18 0.05 EF600mm f/4L IS USM EF12 II 4777 29195 0.14 0.02 EF25 II 4182 13944 0.17 0.05 MF mode is recommended for accurate focusing. ENG-18