What is the primary purpose of the Baader M82a to M68i Adapter?
This adapter's main function is to convert the male M82 thread found on certain focusers, like the Baader 3" Hyperion model, to the versatile female M68 thread. This allows you to securely attach Baader's M68 Tele-Compendium system and other M68-threaded accessories directly to your focuser, eliminating flexure.
Why is this M82 to M68 threaded adapter better than using a standard 2" nosepiece?
A standard 2" nosepiece relies on a compression ring or thumbscrew, which can allow for minute amounts of tilt, especially with heavy equipment. This threaded adapter bolts directly to the focuser, creating a single, rigid unit with your camera and accessories. This completely prevents the sag and flexure that can lead to elongated stars, particularly in the corners of an image.
Which focusers can I use this M82 to M68 adapter with?
This adapter is specifically designed for focusers that have a male M82x1 thread on the camera side of the drawtube. The most common example is the Baader 3" Hyperion Focuser. It serves as the primary connection point to integrate that focuser into the M68 ecosystem.
What do the 'a' and 'i' mean in the M82a / M68i designation?
The letters denote the thread type based on German nomenclature. 'a' stands for Außengewinde (male/external thread), and 'i' stands for Innengewinde (female/internal thread). Therefore, this adapter has an M82 female thread to receive the focuser's male thread, and it presents an M68 female thread for your accessories.
How does the M82 to M68 Adapter help with a heavy imaging train?
With a heavy imaging train (e.g., a large sensor camera, filter wheel, and off-axis guider), the leverage effect can cause significant sag in slip-fit connections. By using this adapter to create a solid, threaded connection, the entire weight is supported rigidly and squarely to the optical axis, preserving collimation and ensuring sharp stars across the entire field.
What is the Baader M68 system this adapter connects to?
The M68 system is a wide-diameter threaded standard, originally used on large Zeiss telescopes, that Baader Planetarium has adopted for a range of professional-grade accessories. It includes extension tubes, adapters, and correctors designed to provide a large, unvignetted, and rigid optical path for serious astrophotography.
