Simple Melody is a WordPress theme from Nudge Themes. It’s suitable for a media-rich blog, portfolio, and photography with elegant style, simple but beautiful design. The number of features is increased if you install and set up the Jetpack plugin recommended by the author. It’s already translated and friendly with every device.
I highly recommend this sweet theme if you want to solely exhibit your photos. The only note for installation is how to set up Jetpack to enable some features. But I don't think it's too difficult if you spend a bit of time to explore it. The SEO configuration is compatible and the speed is not strong but quite acceptable.