[THIS IS WHAT PHONES ARE FOR-- he holds up the screen and shows her the image, which might actually look a bit darker than it was because of the lighting on his phone... but a good ego boost might do her well!]

No, but we can work on maintaining a spell once you've mastered how to activate it! As with everything, the more you practice, the easier it'll be -- and over time, you might even find ways to permanently hold such spells with hardly any effort.