The telescope manufacturer William Optics offers very high-quality apochromatic and achromatic refractors which are very well suited to visual observation, and especially to astrophotography.
Specifies the product's connection or connection thread on the telescope connection end. The same adapter dimension must always be available on the telescope.
The connector or thread found directly on the camera. With this information, you know whether the camera already fits the telescope, or whether an adapter is required.