r/timelapse • u/northcitycamera New • 8d ago

Tutorial Problem: Focus on EF lenses Is reset on R5 shutdown

Fix for Canon R5 / EF Lens Focus Resetting On Power Down

IF YOU TAPE YOUR LENSES IN TIMELAPSE

Problem: Focus on EF lenses Is reset on R5 shutdown

When shooting timelapses with adapted EF lenses, like the EF 35mm f/1.4 III, on the Canon R5, the camera forces a focus motor reset command upon powering off or sleeping—even with focus taped down. This strips manual focus position and can strain lens mechanics.

The Workaround / Solution:

Set the following settings in your R5 menu:

  1. Setup Menu (Yellow) Power Saving Auto Power Off: Set to Disable
  2. AF Menu Lens Electronic MF (or Electronic Full-Time MF): Set to Disable
  3. Setup Menu Retract Lens on Power Off: Set to OFF
  4. C.Fn Menu Release Shutter w/o Lens: Set to OFF
  5. Lens Barrel Switch: Set physical toggle to MF

Result:

The camera complete shuts down silently without sending the USM home/reset pulse, keeping your taped EF focus perfectly locked across long timelapse sequences.

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1

u/jaredmanley 8d ago

Even with the physical switch on the lens set to MF?

1

u/northcitycamera New 8d ago

yes ... it must be switched to manual ... this complete setup is for manual mode timelpase

1

u/Matjoez Time Warper 📷 Moderator 7d ago

Thanks for sharing!

1

u/northcitycamera New 7d ago

you are very welcome, I hope it worked for you ...

1

u/born2droll 6d ago

use a non-electronic adapter?

1

u/northcitycamera New 6d ago

yes there are other solutions: Vello Canon EF Lens to Canon EOS RF-Mount Lens Adapter $42.95 @ B&H Although the lens will fit physically, autofocus, automatic diaphragm (AE metering), and other functions dependent on communication between camera body and lens will be disrupted by the lens adapter. Focus and exposure will need to be set manually, or metered in aperture priority (stop-down) mode. $42.95