ADM Losmandy D Style Mounting Tube Rings

Yes, these rings are designed to fit any standard Losmandy D-style dovetail system, regardless of the manufacturer. As long as your plate follows the industry-standard D-style specifications, these rings will mount securely.

These rings have an internal diameter of 150mm (approximately 5.9 inches). You should measure the outside diameter of your telescope tube carefully; if your tube is exactly 150mm, these will be a very tight fit, so it is generally recommended to have a few millimeters of clearance for padding or adjustment.

Yes, the rings come with the required mounting hardware to attach them directly to a Losmandy D-style dovetail bar. You will not need to purchase additional bolts or fasteners to get them installed.

The aluminum construction provides a rigid, lightweight structure that minimizes flexure, which is crucial for long-exposure astrophotography. While they add some weight to your total payload, their primary benefit is stability rather than mass, helping to keep your optical train aligned.

Absolutely. These rings are frequently used to mount a smaller guide scope onto a primary telescope. Their robust design ensures that your guide scope remains perfectly parallel to your main imaging scope, preventing differential flexure during tracking.