My lens is not focusing I tried another lense it's working but my lens

Good morning,

I am going to have to make a lot of assumptions here as i have no idea what you are asking. I am going to assume you are saying:

My main lens is not focussing however i tried another lens and that focusses just fine.

If that is the case, then buddy it's time to have a little poke around through the lens.

Before you go on the expedition through the internals of a camera lens. When you say it doesn't focus. Does it:

• Grind when attempting to focus (Gears problem)
• Just not even try (Software issue)
• Flash up an error (Camera connection issue)
• Somehow autofocus to infinity and get stuck there (Something else. I have this issue with a canon 18-55 and I have no clue why)

After you've figured out what it is, then go exploring. Make sure you keep track of what goes where because things could get a little disorganised if everything isn't kept intact.