Meow Lightbox has been made for and by photographers. It’s clean, beautiful, the options are simple and straightforward.
If you want to see how it performs, have a look at one of my post on my website, for example, this one: Best Abandoned Places in Japan.
The Pro version adds preloading of the next images and will add more functions in the future.
By default, the selector is set on ‘.entry-content’. This selector represents the CSS elements in which the lightbox will look for images and does its magic. Depending on the theme, or what you exactly need, the selector might be different. Check the FAQ below if you are confused.
When you insert images in your posts, make sure the “Link To” is set to “Media File” or to “Attachment Page“.