Lens filter threads: M40.5 × 0.5 to M112, pitch table and thread rings

sizes

17 in table

Notes

• Screw-in lens filters, step rings, lens caps, hoods and filter holders use a fine metric thread at the front of the lens: the lens has the internal (female) thread, the filter's rear has the external (male) thread and the filter's front repeats the female one.
• Diameter and pitch: Marumi's published thread table (it states that its filters follow the ISO standard values). It gives 0.5 mm pitch up to 40.5 mm, 0.75 mm from 43 to 82 mm and 1.0 mm from 86 mm up. Nikon's own lens specifications state P = 0.75 mm for 46, 62, 67, 72, 77 and 82 mm, agreeing with that table.
• The 'rule' is a convention, not a law: Nikon lists its NIKKOR Z 14-24mm f/2.8 S at 112 mm with P = 0.75 mm, where Marumi's table gives 1.0 mm. Check the pitch your lens maker states (often written 'P = 0.75 mm') before cutting a 112 mm part. 112 mm is not drawn.
• 37 mm, 39 mm and 105 mm filters exist but are not in the table I could source, so they are not listed here.
• Pitch Ø, minor Ø and thread depth are computed from the ISO 68-1 basic profile (60°, H = 0.866025 P, depth 5H/8, D2 = D − 0.649519 P, D1 = D − 1.082532 P).
• Files: for 14 common sizes, a male ring and a female ring 8 turns long, drawn exactly at the basic profile (maximum material, no tolerance, flat crest P/8 and root P/4, right hand). Union the male ring onto a cap, hood or adapter, or subtract the male ring from your part to make a female thread; add your own process allowance on the flanks. Ring walls (2 mm) and length are a design choice.
• Marumi's table also lists a 'basic size' column that it does not explain, and tolerances for its own threads; neither is used here.

Lens filter threads: M40.5 × 0.5 to M112, pitch table and thread rings size chart

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Free files

★ Free files 28 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

Plain text: sheet.txt · JSON: /api/geometry?object=lens-filter-threads

Fits with

Free

Nikon Z mount: 16 mm flange focal distance, 55 mm inner diameter3 sizes★ sheetFree

Sony E-mount: 18 mm flange focal distance4 sizes★ sheetFree

Canon RF mount: 20 mm flange focal distance, 54 mm diameter3 sizes★ sheetFree

T-mount (T2): M42 × 0.75 thread, 55 mm flange, thread rings8 sizes★ 2 filesFree

M42 screw mount (M42 × 1): 45.46 mm flange, thread rings8 sizes★ 2 files