Opto Sigma

• Adjustable bar with separate clamp holds lenses securely

• Accepts a range of diameter lenses

• Both spherical and cylindrical lens types

The adjustable bar type of lens holder has been in common use for a long time. These holders have vee grooves in both the base and the bar to hold the lens more positively. There is a separate clamp which makes it easy to apply the correct pressure to the lens after loosely positioning the bar in place. Each size accepts a range of lenses. The spherical lens type is intended for holding circular lenses, while the cylindrical lens type is more suitable for rectangular shape lenses.