What is the main problem the Baader M68 Tele-Compendium solves?
The primary purpose of the Baader M68 Tele-Compendium is to eliminate mechanical flexure and tilt in long, heavy astrophotography setups. Standard plug-in connections can sag under the weight of cameras and accessories, ruining focus and alignment. The M68 threaded system creates a completely rigid optical train from the focuser to the camera.
Why is the M68 thread used for the Baader Tele-Compendium?
The M68 thread is a large-format standard used on professional instruments, including large Zeiss telescopes. Baader Planetarium chose it for its strength and rigidity, making it the ideal foundation for a system designed to support heavy loads without any deflection, ensuring perfect optical alignment for critical imaging and spectroscopy.
How does the M68 Tele-Compendium help with solar imaging using a Telecentric System?
Solar imaging with a Telecentric System and H-alpha filter requires precise, stable alignment over a long optical train. The Baader M68 Tele-Compendium provides a secure, threaded connection that prevents the telecentric lens from tilting, which is critical for maintaining an evenly illuminated image of the sun. The variable length also helps achieve the correct spacing and baffling required for high-contrast solar work.
Can I use standard 2-inch eyepieces or accessories with the Baader M68 Tele-Compendium?
Yes. The eyepiece-side of the Tele-Compendium includes a robust 2-inch holder with a non-marring brass compression ring and two separate locking screws. This design ensures that even heavy 2-inch accessories are held securely and perfectly parallel to the optical axis, preventing the tilt that can occur with single-screw holders.
I'm imaging planets with a Fluorit Flatfield Converter (FFC) and a heavy camera. How does the Tele-Compendium prevent tilt?
The FFC and camera would connect to the Tele-Compendium via a secure T-2 thread, and the entire assembly is then held within the rigid M68-threaded tube system. Unlike a standard barlow or eyepiece projection adapter that simply slides into a focuser, the Baader M68 Tele-Compendium creates a solid, screwed-in connection back to the telescope, completely removing the leverage and sag that causes tilt in planetary imaging trains.
Does the Baader M68 Tele-Compendium work as a lens hood?
Yes, that is its secondary function. By adjusting its length with the included extension tubes, it acts as a "compendium" or photographic matte box. This customizable length allows you to effectively block off-axis stray light from hitting your sensor, which significantly improves contrast, especially when imaging from light-polluted locations.
