Canon · 4K · ENG / EFP
CJ20ex5B
service and repair
Canon CJ20ex5B is a 4K 2/3″ B4 lens for ENG / EFP production. 20× zoom with a 5–100 mm focal range before an extender is engaged.
- Format
- 2/3″ B4
- Type
- ENG / EFP
- Focal range
- 5–100 mm
- Zoom ratio
- 20×
Listed by manufacturer · Sources checked: 2026-10-07
Send this lens for diagnostics, preventive maintenance or repair. Specialist work takes place in an official service laboratory after quotation approval.
Variants
CJ20ex5B IASE T
Inspection interval
About once a year, depending on operating conditions. Overhaul as needed.
This recommendation applies to the versions covered by the linked manual.
Recommendation source (opens in a new tab)When to request service sooner
Focus shifts during zoom, uneven ring movement, jerky servo operation, iris errors, unusual noise, impact or moisture. Tell us when the symptom occurs and which camera is connected.
Everyday care
Protect the optics from impacts and moisture. Remove dust before wiping surfaces and use suitable optical cleaning materials. Do not dismantle the drive or lubricate internal mechanisms yourself.
Lens care and manufacturer recommendationsControls & accessories
We match demands, cables and parts to the complete lens version. Include photographs of the drive label and connectors with your enquiry.
