What is the Err 20 error on Canon cameras? Causes and solutions
Err 20 is one of the most common errors on Canon DSLR cameras, usually related to the shutter or mirror assembly. This article explains the causes and when to bring your camera in for repair.
Contents (4 sections)
The Err 20 warning appears when the camera detects that the mechanical components (shutter or mirror box) do not operate within the correct timing. This is a common issue on Canon 5D Mark II, 5D Mark III, 6D, 7D, 60D…
Common Causes
- High shutter actuation count, leading to worn or bent shutter blades.
- Weak mirror motor or worn gears.
- Impact damage causing the mirror assembly to misalign.
What You Can Try at Home
- Turn off the camera, remove the battery for about 1 minute, then reinsert it.
- Test shooting in both Live View and regular viewfinder mode.
- If the error persists, stop continuous shooting to prevent further damage.
How much does it cost to fix Err 20?
Depending on the cause: adjusting the mirror assembly is usually simple, while replacing the shutter starts from around 2.5 million depending on the camera model. View details at shutter repair service or book an appointment for a free inspection at the shop.
Frequently asked questions
Can I keep shooting if the camera displays Err 20?
No. Continuing to shoot can break the shutter blades and cause further damage to the sensor or mirror.
Is your camera having the same problem?
Message Đà Thành Camera Repair with a photo or video of the fault – a technician will advise and give a rough quote.