PRIVACY & LIMITATIONS

Your optical train stays local. No camera is connected.

Target backfocus, filter parameters, fixed items, and spacer inventory participate only in the current-page search. SpacerStack does not connect to cameras, mounts, focusers, or cloud accounts, and it never reads images.

Thickness combinations, not optical-system validation

The tool applies the simplified filter correction thickness × (1 − 1/refractive index), sums fixed items, then selects up to 8 pieces from at most 24 named physical spacers. It ranks absolute error to the corrected target and part count, showing the first 20 stacks plus a linearly summed worst-case tolerance band. It does not validate correction direction, manufacturer reference planes, thread standards, clear aperture, usable engagement, tilt, sensor position, or real star images.

Equipment lists may reveal your imaging setup

Refreshing or closing discards inputs. The assembly CSV contains spacer names, thicknesses, mechanical total, corrected target, and error; reports and optional local checkpoints read the visible result summary. Equipment models, inventory, and target backfocus may be private setup data, so review them before sharing.

Advertising and local preferences

This page uses Google AdSense Auto Ads. Google may use cookies or similar technologies under its policies. .miluland.com domain cookies sync language, theme, high contrast, a six-item recent-tools list, and up to 16 favorite tool IDs across MiluLand sites. These values never contain inputs, files, or results; the current site also keeps a local compatibility copy.

Local report studio

The report studio reads only the workbench’s currently visible result summary for local preview, Markdown copy, JSON download, printing, and a SHA-256 fingerprint. It never reads input controls or original files and is not persisted unless you choose to download it.

Optional local checkpoints

Only when you explicitly choose Save does the tool write the visible result summary, time, and optional short label to this site’s browser storage, up to five entries. Imported files and input-control contents are never stored; you can export, restore same-tool checkpoints, or clear them at any time. Imports are limited to 128KB and validate the tool, timestamp, summary, and label of up to 80 characters.