0.5mm/1mm M54 Spacer

Putting the 0.5mm spacer between my lens and adapter fixed my infinity focus perfectly, it's a tiny piece but makes a huge difference. The brass construction feels precise and solid in hand.

The 0.5mm and 1mm options in one set are perfect for dialing in back focal length without ordering multiple parts. I used the thinner one to nudge the focus just right, and it seated cleanly with my adapter kit. Felt precise and solid, no play at all.

I needed to fine-tune the back focus on my adapter kit, and these spacers let me dial it in exactly. The 0.5mm and 1mm options give just enough flexibility without being bulky.