Losmandy D Series
Losmandy D Series dovetail bars measure four inches in width and are ideal for mounting heavier optical tubes or accessories. D Series dovetails should be used when mounting any Schmidt-Cassegrain telescope larger than eight inches in aperture. We also recommend D Series for mounting most refractors of five inches or more in aperture. D Series dovetails are more rigid than the smaller V series and should also be considered four mounting guide scopes atop large Schmidt-Cassegrains.