#catadioptric
Live, measured metrics for the hashtag #catadioptric from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #catadioptric
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 2026-10-18 03:55 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 2026-10-18 03:55 UTCLive pulse
measured · mas.to (Mastodon tag timeline) · fetched 2026-10-18 03:55 UTCEverything below is measured over the latest 37 public posts (spanning ~29768 hours).
Posting hours (UTC) — busiest: 13:00
Languages: English (34) · French (1)
Avg boosts / post: 0.2
Top of the latest posts
https://www.europesays.com/ie/467952/ Kase’s AF 150mm f/5.6 Reflex Lens Embraces Wacky Donut-Shaped Bokeh #bokeh #canonef #catadioptric #Éire #fujifilmgf #IE #Ireland #kase #kase150mmf56reflexaf #mirror #nikonz #reflex #reflexlens #sonye #T
Kase’s AF 150mm f/5.6 Reflex Lens Embraces Wacky Donut-Shaped Bokeh https://petapixel.com/2026/05/04/kases-af-150mm-f-5-6-reflex-lens-embraces-wacky-donut-shaped-bokeh/ #kase150mmf56reflexaf #catadioptric #fujifilmgf #reflexlens #Equipment
Are there any off-axis catadioptric mirror lenses that I can buy for my camera? #cameralenses #optics #cameras #photography #mirrorlenses #reflexlenses #catadioptric #telephotolenses
What “catadioptric” means
WikipediaA catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric combinations are used in focusing systems such as searchlights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes, and telephoto lenses. Other optical systems that use lenses and mirrors are also referred to as "catadioptric", such as surveillance catadioptric sensors.
“Catadioptric system” on Wikipedia (CC BY-SA) →#catadioptric across platforms
every network with a public tag surfaceFollow #catadioptric 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/catadioptric