This lens does not normally have a zoom lock that would cause it to stick mid-range. If the zoom ring is jammed, the lens is likely mechanically damaged rather than simply locked.

Based on the shared experiences, common causes include:

• bent internal guide rails after a knock or fall
• broken internal plastic linkage or gear teeth
• damage affecting aperture linkage when the lens extends

The safest advice is to have the lens inspected or serviced professionally. Forcing the zoom ring may make the damage worse, even if some people have temporarily freed it by turning it more firmly.

A simple non-invasive check is to remove the lens and inspect whether anything looks out of alignment, and whether the aperture linkage still operates when the lens is extended. If the aperture blades do not respond properly, an internal linkage may be broken.

If the lens suffered impact and the zoom is stuck, replacement may be more practical than repair, especially for an older kit lens. Avoid disassembling it unless you are comfortable working on lens mechanics and accept the risk.