Before buying an adapter: a rig verification checklist
Turn a promising dimensional result into a list of specifications to verify.
Check the reference planes
Confirm the exact rear reference point for the reducer or flattener, each installed adapter length, the camera sensor position, and whether the stated target already accounts for filter glass. Never double-count the camera’s flange distance.
Check every physical handoff
Confirm thread diameter, pitch, gender, engagement depth, shoulder contact, and clearance. Inspect the telescope-to-first-component handoff separately. Check the clear aperture of filters and adapters; this tool does not ray-trace vignetting.
Keep a reproducible record
Attach source links to each component. Save the current plan before trying a change and use Compare to hold a baseline. Export your final plan with its sources. A source link is provenance supplied by you, not an independent certification.