diff --git a/img-tools.md b/img-tools.md
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--- a/img-tools.md
+++ b/img-tools.md
@@ -576,6 +576,7 @@
 * [PhotoFeeler](https://www.photofeeler.com/) - Get Photo Feedback
 * [Picviewer CE+](https://github.com/hoothin/UserScripts/tree/master/Picviewer%20CE+) - Turn Webpages into Image Galleries
 * [Binternet](https://github.com/Ahwxorg/Binternet) - Pinterest Frontend
+* [/r/Photography Guide](https://www.reddit.com/r/photography/wiki/introduction) - Photography / Camera Guide
 * [PhotoEphemeris](https://photoephemeris.com/) - Photography Sunlight Calculator
 * [DataFilm](http://datafilm.io/) - Notebook for Film Photographers
 * [GlanceBack](https://glanceback.info/) - Daily Webcam Photo Journal