Celestron SCT to 2" Adapter (93661) Spottingscope To use third-party focuser control

To use third-party focuser control software

Look at the diffraction spike pattern and continue until the spikes are even

especially in low light conditions

the 48mm receives more light than the 42mm T-Adapter and will reduce vignetting in your images

Celestron SCT to 2" Adapter (93661) Spottingscope To use third-party focuser controlThis sturdy, high quality adapter provides a solid connection between your Schmidt Cassegrain or Maksutov Cassegrain telescope and 2 accessories without any special threaded 2" diagonal. This accessory makes it possible to maximize your views through your telescope with your standard 2 diagonal, eyepieces, and other accessories (like photo adapters) allowing you to connect a camera for astroimaging. The adapter offers an ultra secure threaded