Observed arrival · 2026-10-28
Expected HFR Matrix
A telescope-and-camera calculator estimates NINA half-flux radius and sampling for equipment pairings, with seeing forecasts for a chosen location.
○Open
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Astrophotographers comparing telescope and camera setups
- Worth noticing
- Forecasts cover 9 p.m.–3 a.m. local time; a stated jet-stream rule of thumb maps wind bands to seeing estimates.
Field notes
The displayed model derives angular scale from pixel size and focal length, then combines several blur terms before converting the result to HFR in pixels. Location forecasts use a stated jet-stream wind rule of thumb, and the page notes that 7Timer!'s seeing scale cannot separate average from poor conditions above 2.5 arcseconds. Users can export or restore equipment lists as JSON.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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