I’ve been given a Nikon DX lens that’s about 10 years old. It’s great when it works, but I often get an error message saying that the lens is not attached to the camera. What’s going on? Brian Curtis, via email
Jason says... An intermittent electronic connection between the camera body and the lens usually causes this. Visually inspect the contacts on the camera and the lens, to check that they’re clean and shiny, without any build-up of muck. If they’re dirty, wipe them with a clean, lint-free cloth.
For contacts that are heavily soiled, try using a can of electronic contact cleaner, which costs about £5/$8. They’re usually supplied as aerosol cans, so it’s important to spray the solution only onto a clean cloth, away from the camera, and never directly onto the lens or into the camera body. If the problem persists, there’s likely to be a more serious fault with the lens that will require professional repair. The electronic contacts on lenses should be clean and shiny, without any build-up of grime that can cause a bad connection