Lens-holder
Rolyn Optics
All aluminum lens mount holds stock lenses simply by threading a retaining ring inside the lens mount to the desired depth, then inserting the lens and fixing it in place with the retaining ring and a spanner wrench. More than one lens can be mounted in the cylinder if desired, making it ideal for holding double lens condensers and other systems. In addition, the cylinders can be threaded into one another to provide an endless variety of possibilities.
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