This board is in mint condition and may never have been used. 66mm opening for copal 3 shutter.

The Calumet 50115 6" lens board is designed specifically for use with a Copal 3 shutter, making it ideal for film photography enthusiasts looking to achieve precise shutter control. This lens board provides a secure and stable attachment point for lenses, allowing photographers to easily attach and detach lenses while maintaining accurate focus and composition. Its 6" size ensures a stable mount for lenses, making it a valuable tool for capturing high-quality images with a Copal 3 shutter.