Using Focus Preset on the EF 300mm f/2.8L IS II USM lens

Article ID: ART174614 | Date published: 05/31/2019 | Date last updated: 05/31/2019


Using Focus Preset on the EF 300mm f/2.8L IS II USM lens


Focus Preset

By presetting any focusing distance, you can instantly focus at that point even while you are shooting a different subject. This function operates in any of the AF, PF, amd MF modes.
<How to Set>  
Set the focus preset switch to ON or .
Press the shutter button halfway or turn the focusing ring to focus the distance you want to preset.
Press the focus preset button.
  • The focused distance will be preset.
  • If the focus preset switch was set to , the beeper will sound once.
<How to Focus at the Preset Distance>

By turning the playback ring to the left or right, the focus shifts as far as the preset distance. 
Focus will shift freely released of AF focusing while the playback ring is still turned.
  • If the focus preset switch was set to ‚Äč, the beeper will sound twice.
Setting the focus mode switch to power focus (PF) when using the lens with the following cameras enables focus change to a preset focusing distance at a slow speed during movie shooting. Also, you can make a 2-step change in focus shift speed depending on the angle that the playback ring is rotated to.
EOS-1D X, EOS 5D Mark III, EOS 6D, EOS 70D, EOS REBEL T5i/700D, SL1/100D, T4i/650D, T5/1200D
EOS M2* and EOS M when used together with Mount Adapter EF-EOS M.

* Not available in certain countries and regions.
  • When turning the playback ring, keep your finger away from the shutter button. In One-Shot AF mode, the exposure will be locked when you press the hsutter button halfway and focus is achieved. So if you press the shutter button halfway while turning the playback ring, the exposure may not be correct.
  • When not using the focus preset, set the switch to OFF.
  • The focus preset function will not work while a Live View image is displayed on the camera.*
* Not applicable to the EOS-1D X or EOS 5D Mark III
In the following cases, the focusing distance scale will move slightly. It will not affect the image.
  • When you press the focus preset button.
  • When you turn the playback ring.

Rate this Article
Was this article helpful?
Yes, This document is helpful
No, This document needs a clearer explanation
Please provide your comments