Baader Planetarium Adapter D60 (Pentax) to 2" Nosepiece

This adapter allows you to connect standard 2" accessories (like diagonals, eyepieces, or cameras with a 2" nosepiece) to a focuser with a 60mm inner diameter, such as the Pentax 60mm standard. It effectively bridges the Pentax 60mm bore to the universal 2" format.

Yes, if its focuser has a 60mm inner diameter (Pentax 60mm standard). The adapter sits in a 60mm focuser bore and its 2" bore takes the barrel of your Tele Vue diagonal, which the bronze pressure ring and two M4 screws hold in place.

First, fit the Baader D60 adapter into the 60mm bore of your Pentax focuser. Then slide your camera's 2" nosepiece into the adapter and tighten its two M4 screws.

This is a purely mechanical adapter and contains no optical elements. It is machined to maintain alignment. However, like any adapter, it adds physical length to the optical path, which you must account for when measuring for back focus, especially in imaging setups.

The D60 designation refers to the 60mm focuser bore of the Pentax standard. This adapter is not threaded: it is a 60mm outer diameter sleeve, so no thread pitch has to match.

The primary benefit is a secure, clamped fit between the 60mm focuser bore and your 2" accessory. This is more rigid and less prone to tilt than solutions that might involve multiple stacked, slip-fit adapters. It provides a solid foundation for your 2" accessories.