M25.5 Optical Filters for Machine Vision

Optical filters with M25.5 threads can be mounted directly onto compatible industrial camera lenses. Depending on the filter type, they can select specific wavelengths, suppress unwanted light or reduce reflections.

The available bandpass, polarising and other filter types are listed in the product overview on this page.

Filter Mounting and Compatibility

In addition to the nominal thread diameter, check the thread pitch of the lens. Both must match to ensure correct mounting. M25.5 and M25.0 filters are not interchangeable.

Also consider the clear aperture of the filter. An opening that is too small may cause vignetting with certain lenses.

Which Optical Filter Do You Need?

Filter selection depends on the illumination, the spectral sensitivity of the camera and the properties of the material being inspected.

Our technical optical filter selection guide explains the differences between bandpass, longpass, shortpass and polarising filters, with practical examples from industrial machine vision.

For other mounting sizes, explore our complete range of optical filters.