Stellarvue Reducer/Flattener for SV70T

This accessory serves two primary purposes: it shortens your telescope's focal length to provide a wider field of view, and it flattens the image plane. This ensures that stars appear sharp and round across the entire frame, rather than distorted or elongated at the edges.

This specific unit is engineered with the optical characteristics of the SV70T in mind. While it uses a standard T-Mount connection, using it on a telescope with a different focal length or optical design may result in poor image quality or an inability to reach focus.

The T-Mount is a universal standard for astrophotography. To use it, you will need a T-ring specific to your camera brand (such as Canon, Nikon, or Sony E-mount), which then threads directly onto the reducer/flattener.

Yes, proper back-focus is critical when using a flattener. You will need to ensure the distance between the back of the reducer and your camera's sensor matches the manufacturer's specified requirement, typically 55mm for most standard setups, to achieve optimal edge-to-edge sharpness.

By reducing the focal length, this accessory effectively increases the focal ratio of your telescope, making it 'faster.' This allows your camera sensor to capture more light in a shorter amount of time, which is ideal for imaging faint deep-sky objects.