how do i make my 0.5 work again

Hi abbydmz,

For help with zooming with your iPhone camera, check the information below found in the article here: iPhone camera basics - Apple Support

"Zoom in or out

• On all models, open Camera and pinch the screen to zoom in or out.
• On iPhone models with Dual and Triple camera systems, toggle between 0.5x, 1x, 2x, 2.5x, and 3x to quickly zoom in or out (depending on your model). For a more precise zoom, touch and hold the zoom controls, then drag the slider right or left."

You can also find helpful information here: Use camera modes on your iPhone or iPad

If the issue remains, you can test closing the app and completing a normal restart of your iPhone. Restart your iPhone

Should your iOS be fully updated and the issue continues after the restart, reach out to Apple Support directly to further assist.

Contact - Official Apple Support

Contact Apple for support and service - Apple Support

Cheers.