ADM D Series
ADM D series dovetails and accessories feature 4-inch wide dovetail bars with 3-inch mating surfaces and various accessories including as guide scope rings. D series dovetail bars are directly compatible with mount saddles of Astrophysics, Losmandy, and the large mounts from Celestron, Orion, Sky-Watcher, and others. The advantage of the D Series dovetail is its strength and rigidity when working with heavier telescopes. This is a double edged sword, as D-Series accessories will be heavier than their V Series counterparts. We suggest using V Series dovetails for mounting accessories onto 10-inch or larger Schmidt-Cassegrains, but V Series is usually adequate for smaller SCTs.