#petzval
Live, measured metrics for the hashtag #petzval from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #petzval
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mas.to (Mastodon public tags API) · fetched 2026-09-27 14:41 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mas.to (Mastodon public search API) · fetched 2026-09-27 14:41 UTCLive pulse
measured · mas.to (Mastodon tag timeline) · fetched 2026-09-27 14:41 UTCEverything below is measured over the latest 40 public posts (spanning ~23540 hours).
Posting hours (UTC) — busiest: 17:00
Languages: English (27)
Avg boosts / post: 1.1
Top of the latest posts
I could have made a second plate, but recently I often decide to let things be. I know what I needed to change to create a clean plate, but the goddess of collodion decided to create this oyster marks in a way to find harmony with the pose
Got a pretend #Petzval from Ebay as the actual ones are a little pricey. Not bad! https://www.flickr.com/photos/jyotimishra/albums/72177720326472425 #Photography #SwirlyBokeh #Bokeh
A photo from Raven's Nest at Schoodic Point in Acadia National Park, taken with a bit too much tilt on my 1850 Petzval lens (too much because it led to the vignetting). 190mm, f3.7, 1/50s, Ortho Litho film rated as ISO 6, developed in df96
What “petzval” means
WikipediaJoseph Petzval was a mathematician, inventor, and physicist best known for his work in optics. He was born in the town of Szepesbéla in the Kingdom of Hungary.
“Joseph Petzval” on Wikipedia (CC BY-SA) →#petzval across platforms
every network with a public tag surfaceFollow #petzval straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/petzval