I guess it must be as the upgrade was loaded.Do you have the iPhone 4S? iOS 8 is not available for the iPhone 4.
Does the camera icon show on the home screen? If not, go to Settings>General>Restrictions>Camera and make sure the switch is turned on. If that doesn't work, try restarting the phone. Press and hold both the power and home buttons until the Apple logo appears, then release both buttons and wait for the phone to restart.
Let us know if either procedure works or not.
Do you have the same problem with both cameras, front and rear?
There's also the possibility that your iPhone may have a hardware problem. Have you considered having it checked out at an Apple Store Genius Bar?
Have you tried a 3rd party Camera app? They use the same basic camera, but I'm curious if it makes a difference.Yes it is the same for both. Next step, the Apple Store. Thank you for your assistance.