ZWO M42-M48 Extender - 22.5mm - ZWO M42-M48-22.5

The ZWO M42-M48 22.5mm Adapter is useful to obtain a precise spacing when using a focal reducer or corrector that needs a certain chip-reducer spacing. It can also help you to get the 55mm backfocus distance.  

This 22.5 mm spacer is useful for ASI2600MM Pro users who want to connect the camera to a 7x36mm filter wheel to reach 55mm back focus distance when an OAG-L is not in play.