Here is a list of Genesis child themes for for photography, photo, image, photographer, pictures, portfolio blogs:
1) Apparition Theme: Apparition theme is a unique photography theme where thumbnails are circular. Description of the image is shown next to the photograph. Theme is responsive for all devices and resolutions.
2) Crystal Theme: Crystal Theme has a medium size featured slider at the home page. Below that you can show thumbnails of 5 photographs. Below this section you can display three pages as per your requirements. Theme comes with 6 layout options.
3) Expose Theme: In the homepage of the Expose theme you can display 9 elements. Each element has a thumbnail image along with description. Theme comes with 6 layout options.
4) Landscape Theme: Landscape theme has a big featured image slider in the home page. Below the slider there is a thumbnail image gallery and below that there are three widget ready areas. Theme comes with 6 layout options.
5) Manhattan Theme: Manhattan Theme has a big featured image slider in the home page. Below the slider there is a thumbnail image gallery and below that there are widget ready areas. Theme comes with 6 layout options.
6) Modern Portfolio Theme: Modern Portfolio is a portfolio photography theme where you can display big bold text in the front page. Below that you can add a portfolio thumbnail gallery section. After that there is a text section in the home page where you can show the about or services page of your blog. Then, you can display the recent blog posts along with thumbnails. In the footer there are three widget ready areas.
7) Pretty Pictures Theme: Pretty Pictures Theme has a big background image section with text in the home page. Below that you can display recent blog posts with big thumbnail images.
8) Stretch Theme: Stretch theme is a simple portfolio theme with a custom background image. Theme comes with 6 color options.