Lock Ring for Kowa 16-H to use it with Rectilux HCDNA

• Front side - M75x0.75 male thread and M72x0.75 female thread
• Rear side - M68x0.75 female thread

This adapter replaces front ring of Kowa 16-H and serves few purposes:

• It locks the focusing mechanism of Kowa at desired position (infinity for most applications)
• It allows installation of Rectilux HCDNA attachment
• It allows using standard 72mm screw-in filters (if no HCDNA installed)

Machined from high quality aluminium alloyWhy aluminium?.

Known compatible lenses:

• Kowa 8-Z
• Kowa 16-H
• Elmoscope 2

Known compatible single focus units:

• Rectilux HCDNA
• Rapido FVD-16A
• Rapido FVD-16B