M54公頭 to M54公頭 (內孔M48) 轉接器

Finally got this to mate my filter drawer with the reducer, the 2mm thickness is perfect for keeping the backfocus right. Threads are smooth and precise for the price.

I was worried the threads might bind, but the 0.75mm pitch threaded on smoothly and the 2.0mm thickness didn't throw off my back focus.

This adapter fit perfectly between my reducer and filter wheel, and the 0.75mm thread pitch made it feel secure without any wobble. The 2.0mm thickness is just right for keeping my optical train nice and tight.