The iPhone 13 Pro and Pro Max are the latest iterations of Apple's popular iPhones. They both use the latest A15 chip, have a 6.1" / 6.7" Retina XDR display, and an advanced camera with telephoto, wide, and ultra-wide shooting modes. The new integrations for macro photography really pushes the phone to be a great option for photographers.
If you have an iPhone 12, you don't need to upgrade to this line of phones. If you have an iPhone 11 or earlier, the iPhone 13 is a great upgrade.