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This blog has its own fediverse account:
@blog@take-a-photograph.com
To follow it, search for that handle in Mastodon (or any other fediverse app) and press Follow. New posts will then show up in your home timeline.
Replying to a post from your fediverse account adds your reply to the bottom of the post here on the blog. Only public and unlisted replies are shown; followers-only replies and direct messages stay private.
If you prefer, there is also an RSS feed.