NASA’s Nancy Grace Roman Space Telescope team has completed a marathon of activities to fine-tune its Wide Field Instrument (WFI), the 300.8-megapixel camera.

Components such as the detectors, electronics, filter wheel, calibration system, alignment, thermal system, focus, ...

The secondary mirror position had to be adjusted by just ~4 μm.

As a result, WFI performance is nearly 30% better than predicted.
👏
https://science.nasa.gov/blogs/roman/2026/10/14/nasa-roman-team-checks-out-main-instrument-sharpens-telescopes-focus/
https://eyes.nasa.gov/apps/solar-system/#/earth
29/n