my iphone 5 camera is not focusing close up??

Has the phone been dropped lately?

To rule out a software issue, set ti back to factory settings, as described in this article and test the camera after that:

Use iTunes to restore your iOS device to factory settings - Apple Support

In case this does not work, the problem is hardware related and the phone has to be serviced by Apple.

Start a service request

Find an Apple Authorized Service Provider

Make an Apple Store appointment

There is a discussion about some users with a similar problem , however, I would not do that to my device.

iPhone 5 camera won't focus