Use the Alpine Astronomical Baader M43x0.75 Male to T2 Male Adapter to convert M43x0.75 male Takahashi threads to a standard T-2 size. As part of the T-2 Astro modular accessory system, this adapter allows you to use all of the components in the line—including rings, extension tubes, filter holders, and other adapters—to build custom imaging rigs. The adapter adds just 0.8mm of optical length, and is also outfitted with M34 internal (female) threads.