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As a photographer, it's crucial to ensure that the filters you purchase are compatible with your lenses. One key factor to consider is the thread pitch, which determines whether a filter will properly screw onto your lens.
Thread pitch refers to the distance between the threads on a screw or, in this case, the lens filter thread. It is typically measured in threads per inch (TPI) or threads per millimeter. The thread pitch must match between the lens and the filter for them to be compatible. Most modern camera lenses and filters use a standard thread pitch of 0.5mm (20 TPI). However, some older lenses or specialized filters may have different thread pitches, such as 0.75mm (16 TPI) or 0.625mm (24 TPI).
Using a filter with the incorrect thread pitch can lead to several issues:
Marumi's filter lineup typically follows the ISO standard described Values with millimeters below.
| Screw thread A major diameter |
pitch | Basic size | Tolerance Upper deviation |
Tolerance Lower deviation |
| 13.5 | 0.5 | 15 | 0 | -0.18 |
| 16.5 | 0.5 | 18 | 0 | -0.18 |
| 19.5 | 0.5 | 21 | 0 | -0.21 |
| 22.5 | 0.5 | 24 | 0 | -0.21 |
| 25.5 | 0.5 | 27 | 0 | -0.21 |
| 30.5 | 0.5 | 32 | 0 | -0.25 |
| 35.5 | 0.5 | 37 | 0 | -0.25 |
| 40.5 | 0.5 | 42 | 0 | -0.25 |
| 43 | 0.75 | 45 | 0 | -0.25 |
| 46 | 0.75 | 48 | 0 | -0.25 |
| 49 | 0.75 | 51 | 0 | -0.30 |
| 52 | 0.75 | 54 | 0 | -0.30 |
| 55 | 0.75 | 57 | 0 | -0.30 |
| 58 | 0.75 | 60 | 0 | -0.30 |
| 60 | 0.75 | 62 | 0 | -0.30 |
| 62 | 0.75 | 65 | 0 | -0.30 |
| 67 | 0.75 | 70 | 0 | -0.30 |
| 72 | 0.75 | 75 | 0 | -0.30 |
| 77 | 0.75 | 80 | 0 | -0.30 |
| 82 | 0.75 | 85 | 0 | -0.35 |
| 86 | 1.0 | 90 | 0 | -0.35 |
| 95 | 1.0 | 100 | 0 | -0.35 |
| 100 | 1.0 | 105 | 0 | -0.35 |
| 112 | 1.0 | 117 | 0 | -0.35 |
| 122 | 1.0 | 127 | 0 | -0.35 |
ISO1948:1987(en)
Photography: Front lens barrels up to 127 mm Dimensions important to the connection of auxiliaries
Understanding thread pitch is crucial for ensuring that your lens filters are compatible with your camera lenses. By matching the correct thread pitch, you can avoid potential damage to your equipment and ensure optimal performance from your filters. When shopping for filters, always verify the thread pitch specifications to ensure a perfect fit and seamless integration with your photography gear.
Thank you for your attention!
Marumi Team
