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Probe Lens Focus Calibration - Marks, Lookup Table, and Real Distances

Summary

Probe and macro lenses often do not map cleanly with Flair's standard 3-point focus calibration. Operators reported that Laowa 24mm macro probe focus markings did not match where Flair thought focus was, that skaterscope macro setups could not focus to infinity, and that newer Laowa/DZO focus rings measure from the probe tip/front rather than from the sensor plane.

The practical solutions are to use a Lookup Table, measure real distances instead of trusting barrel marks, use Focus Follows Object or Focus Independent, and understand the lens' distance reference before entering close focus values.

Symptoms

  • Laowa 24mm macro probe focus markings do not match Flair.
  • 3-point calibration does not match the full focus range.
  • Focus Follows Target is soft at some distances.
  • Probe or skaterscope setup cannot focus to infinity.
  • Close focus values such as 0.004 or 0.006 are misread as centimetres.
  • Laowa / DZO X-Tract focus ring marks appear wrong when measured from the sensor plane.

Community Solutions

[CONFIRMED] Use Lookup Table for non-linear macro/probe focus

If 3-point calibration does not fit, use the Lookup Table mode in Lens Setup. This is the same broader solution used for macro lenses and non-linear cine lenses.

Confidence: 0.9

[CONFIRMED] Use Focus Follows Object or Focus Independent

For probe/macro work where measured focus is unreliable, use FFO or Focus Independent and add focus keyframes manually. Focus Independent is especially important around 1:1 where focus is no longer a normal distance relationship.

Confidence: 0.88

[CONFIRMED] Know where the lens measures from

Older Laowa probes may measure like a traditional lens, but newer Laowa probe models and DZO X-Tract marks are described in chat as measuring from the end/tip/front of the lens. If you are not using the probe/tilting lens workflow, measure from film plane to lens tip and add that value to the focus marks.

Confidence: 0.82

[LIKELY] Enter close focus in metres

Laowa and DZO close focus values are in metres. In the chat, 0.004 was clarified as 4 mm, and DZO close focus was described as 6 mm.

Confidence: 0.78

WhatsApp Excerpts

Timestamp User Evidence
2020-05-20 19:12 Tom D "Laowa 24mm macro probe ... only three focus points ... lens focus markings not always matching where the flair focus thinks it is."
2020-05-20 19:16 Timothy Heys Cerchio "The real practical solution is to measure Target by hand and Focus Independent (or Object)."
2020-05-20 19:19 Sebastian Opitz "I usually set to focus follows object and add focus keyframes wherever it seems to be off throughout the move."
2020-05-20 19:24 Timothy Heys Cerchio "Multiple point Focus Calibration" was in testing for Flair 6.45.
2020-12-07 22:44 Timothy Heys Cerchio "Focus Independent and measure your Target Distances!"
2024-04-25 23:31 Timothy Heys Cerchio "Focus notches on lens are referenced from the front Nodal Point ... Or, actually from the front of the lens."
2026-03-28 08:18 Niko "Laowa and dzo measures in the focus ring are from the tip of the lens, not from the sensor."
2026-03-28 08:23 Niko "Measure the distance from the film plane to the end of the lens and add that value to the focus marks during calibration."
2026-03-28 08:33 Niko "Laowa measures are in meters 0,004 is 4 mm ... dzo is also measured in meters."