Canon EF 50mm f/1.4 USM Lens — For Parts / Not Working
Condition: For Parts or Repair — Non-Functional
Condition Notes: Autofocus (AF) and manual focus (MF) are both non-functional — this lens will not focus in either mode. Sold strictly as-is for parts or repair. Cosmetic condition and glass quality not represented as usable; buyer should assume this unit needs mechanical repair or is suitable for parts only. Please review photos for full physical condition.
What's Included: Lens body only.
Shipping & Returns
Ships from Vancouver Island, BC, Canada. Shipping within Canada only — we do not ship to the US or internationally.
Sold as-is, for parts/not working, as described above. The 30-day limited warranty does not apply to the disclosed AF/MF fault, but does cover the item matching this description on arrival (i.e., protection against undisclosed additional damage, wrong item, or non-delivery).
About This Item
The Canon EF 50mm f/1.4 USM is a fast standard prime lens built around Gaussian optics with two high-refractive-index elements and Canon's Super Spectra coating, designed to control aberrations and flare at wide apertures. It uses Canon's Micro USM autofocus motor with full-time manual focus override, in a compact, lightweight barrel. It's a long-running favorite for portraits, low-light, and general-purpose shooting on full-frame and APS-C EF-mount bodies.
This particular focus mechanism is a known weak point on this model — Canon issued an official service notice covering certain serial number ranges for a focus-related malfunction, and independent repair shop data has shown this lens with an above-average rate of AF motor failures over its production life. This is offered as general background only; no claim is made about the specific cause of this unit's fault.
Compatibility Notes
- Mount: Canon EF (full-frame and APS-C Canon DSLR bodies)
- Useful for parts (focus motor, optical elements, barrel/mount hardware, electronics) on other EF 50mm f/1.4 USM units, or for repair by a qualified technician
- Not usable for photography in current condition
Specifications
| Spec | Detail |
|---|---|
| Focal Length | 50mm |
| Maximum Aperture | f/1.4 |
| Minimum Aperture | f/22 |
| Optical Construction | 7 elements in 6 groups (Gaussian design, 2 high-refractive-index elements) |
| Angle of View | 46° (diagonal, full-frame) |
| Diaphragm Blades | 8, rounded |
| AF Actuator | Micro USM (ultrasonic motor), full-time manual override |
| Minimum Focus Distance | 0.45m |
| Maximum Magnification | 0.15x |
| Filter Size | 58mm |
| Dimensions | 73.8mm (dia.) x 50.5mm (length) |
| Weight | ~290g |
Fact-check sources: Canon's official EU/CNA specification pages, B&H Photo's product listing, and KEH's listing for baseline specs — all consistent. Failure-mode context drawn from Canon's official service notice (dpreview.com, Canon Australia support page) and Lensrentals.com repair-rate data as cited in Canon Community forum discussion.