圖片僅作供參考，並不代表產品實物及所包括配件。 Pictures shown are for illustration purpose only and may not be an exact representation of the product and accessories included.
Description
- Adjusts back-focus between your camera and telescope for the best astroimaging results
- Kit includes 3 spacer rings of different lengths (7.5mm, 12mm, 30mm)
- Threads to your T-Ring and T-Adapter with standard male and female T-Threads
