CLA usually stands for Clean, Lubricate, Adjust. On cameras or lenses, it generally means the gear is disassembled as needed, cleaned, old lubricants are replaced, and the focus, aperture, or other mechanisms are checked and adjusted back into proper operation.

For lenses, a CLA may include cleaning internal haze/dust deposits, servicing stiff or loose focus movement, checking aperture action, and reassembly/alignment. For cameras, it can range from routine cleaning and inspection to replacing worn parts, fixing light seals, or recalibrating after wear or impact.

Whether a lens needs CLA depends on condition more than age alone. Common signs are internal fogging/haze, fungus, uneven or sticky focus, aperture problems, obvious contamination, or generally rough operation. Heavily used older gear is more likely to benefit from service.

Cost varies widely by region, technician, and the complexity of the specific lens or camera. Simple jobs may be relatively inexpensive, while complex or premium equipment can cost much more. In short: CLA means professional preventive maintenance or corrective service, and it’s most worthwhile when the gear shows clear symptoms or is valuable enough to justify upkeep.