Lens Repair

Autofocus and manual focus lenses for digital and film systems. Mechanically a lens is a set of sliding barrels, cams and an aperture assembly, so most faults come down to wear, contamination or a knock. Vintech is an independent service centre and we repair all brands, makes and models.

Faults we see

Focus and zoom mechanisms

Focus or zoom rings that are stiff, gritty or seized altogether, barrels that bind at one end of the range, and zoom creep where a lens extends under its own weight. On older lenses the cause is often helicoid grease that has hardened or migrated with age.

Aperture blades

Blades that stick, close sluggishly or stop down unevenly, and oil that has migrated onto the blade surfaces from nearby lubricant. On electronic lenses this can also show up as an aperture control error reported by the camera body.

Fungus, haze and dust

Fungus grows on internal element surfaces as fine branching threads and spreads if the lens stays in a warm, still cupboard. Haze is a thin film that settles on glass as lubricant outgasses. Both reduce contrast, and both are cleaned by stripping the lens down to the affected element. Fungus left for a long period can etch the coating underneath, so any permanent marking is only assessable once the lens is opened. Dust between elements is also removed during a strip-down.

Autofocus

Autofocus that hunts, buzzes, stalls or does not drive at all, ultrasonic and stepper motor faults, focus-by-wire rings that no longer respond, and dirty or damaged electrical contacts between lens and body.

Impact damage and element alignment

A solid knock can shift an element group out of alignment. The usual sign is an image that is soft or smeared down one side of the frame while the other side is sharp. Realigning the affected group brings the optical axis back into line.

Mounts and fittings

Loose, cracked or bent mounts, worn bayonet lugs, stripped screws, filter threads dented so a filter will not thread on, loose focus and zoom rings, and damaged hood mounts.

Focus calibration

Consistent front- or back-focus, where autofocus lands reliably in front of or behind the point you selected. Calibration is done against a specific body, so bring the camera you use the lens with.

What to bring

Bring the body you normally pair the lens with, front and rear caps, and sample images showing the problem if it is an optical or focus issue rather than a mechanical one. If several lenses show the same fault on one body, bring them all — the cause may be the body rather than the glass.

Quote times, service timeframes and the warranty on photographic equipment are set out on warranty and turnaround. To book a lens in, see the contact page.