Pro Coma Corrector 3" 0.85x

Describes the item for which the accessory is suitable.

The optical elements are treated with ultra-thin coatings. Among others, there are anti-reflective coatings for reducing, and dielectric coatings for increasing reflection.

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.

Additional optical elements that are useful for focal astrophotography.