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
- A set includes one piece each of 1mm, 0.5mm, and 0.3mm thickness shims.
- Used to adjust the distance between the lens barrel and corrector plate to achieve the ideal back focus position.
- Suitable for telescopes with an aperture of F/4 or below.
