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
The thickness is 7mm so you can use C or CS lens with ASI cameras depending on the required backfocus. The backfocus of a C lens is 17.5 mm and of a CS lens it is 12.5mm.
