Category Pages (Pro Version)

Go to Posts => Add New
Enter title of photo
Enter description of photo as body text
Add photo as Featured Image
Under Format, select the Image option
Create a new Category or select a current Category
Click Publish
Go to Appearance => Menus
Click on Categories in the left sidebar
Select the Category and click Add to Menu
Arrange category and click Save Menu
Go to Appearance => Customize
Click on Category Pages and select your page to customize
Select Category Page options: Full-width or Sidebar, Title or No Title, number of photos to display ( set to 0 to display all )
Click Save & Publish

Go to Downloads => Add New
Enter title of photo
Enter description of photo as body text
Create a Category
Create a Tag
Add photo as Featured Image
Create pricing options and set the price of the download (for variable pricing, multiple options must be set)
Create file by adding file name and uploading image from media uploader
Add as many files as you have of the photo
Click Publish
Go to Appearance => Menus
Click on Categories in the left sidebar
Select the Category and click Add to Menu
Arrange category and click Save Menu
Go to Appearance => Customize
Click on Category Pages and select your page to customize
Select Category Gallery options: Full-width or Sidebar, Title or No Title, number of photos to display ( set to 0 to display all )
Click Save & Publish