Haida 40mm Lens Thread to M10 100mm Filter Holder Adaptor Ring HD4251-40

Dedicated M10 100mm Filter Holder Adaptor

This adaptor ring connects lenses with a 40mm filter thread to the Haida M10 100mm filter holder system. It is built from aluminium and carries model reference HD4251-40. The ring is designed exclusively for the M10 holder, ensuring a precise mechanical link between the lens barrel and the filter frame.

Capacity and headroom: 40mm thread to 100mm system

The ring accepts any lens that presents a standard 40mm front filter thread, allowing that lens to carry the full 100mm square or rectangular filter range. It runs out when a lens has a different thread pitch or diameter, or when a filter holder other than the M10 series is used. No step-up or step-down function is provided; the adaptor is a single fixed conversion.

Build integration: aluminium ring for M10 workflow

The all-metal construction mates directly with the M10 holder’s locking mechanism, adding minimal thickness to the optical path. It frees the photographer to use graduated neutral density, polarising or creative filters on lenses that would otherwise be incompatible with the 100mm system. The ring requires the M10 holder itself and a lens with a 40mm thread; it does not adapt other thread sizes or holder types.