The camera used in order to take a scan with an iPhone 13 Pro or an iPhone 13 Pro Max is the ultra-wide camera.
Here are the recommended guidelines to place an iPhone 13 Pro or an iPhone 13 Pro Max correctly into the ScanBox:
iPhone 13:
iPhone 13 mini:
iPhone 13 Pro:
With an iPhone 13 Pro, we recommend placing the pointer on the 3.5 scale on the right.
iPhone 13 Pro Max:
With an iPhone 13 Pro Max, we recommend placing the pointer on the 4.5 scale on the right.