Brunson 521-B Spherical Adapter Box Levels The M-series stands are available

The M-series stands are available in a short or tall version

The swivel pads have a thin

This model telescope has adjustments to maintain the line of sight straight throughout a focusing range of two inches to infinity

In addition

Bright inks for high visibility

Brunson 521-B Spherical Adapter Box Levels The M-series stands are availableMounting flexibility is what you get with the 521 B spherical mount. It is compatible with any 2" alignment telescope or collimator, allowing you to position your telescope in the many orientations your application may require. The spherical mount also functions as a target holder for alignments requiring precision target fixtures. It has three radial setscrews at approximately 120 degree intervals, as well as three "axial" setscrews in a line along