Yes. Dropping a lens often damages the focus mechanism, guide gears, or autofocus ribbon cable, all of which can be replaced by a technician. In cases of liquid contact, the lens must be disassembled and cleaned immediately to prevent internal mold growth and corrosion on optical elements.

Small black spots on images are caused by dust or debris on the camera sensor (matrix), which become especially visible at narrower apertures. DIY cleaning with cotton swabs or unapproved liquids is strongly discouraged due to the high risk of scratching the sensor. Cleaning should be performed in a service center using specialized swabs and solutions.