This camera-specific bayonet adapter is tailored for Canon EOS DSLRs, featuring a large M48x0.75 mm female thread that helps eliminate vignetting on full-frame sensors. With a spacious inner diameter of 47.5 mm, it allows for unobstructed light transmission and sharp images across the entire frame. Crafted from matte black anodized aluminum, the adapter is both lightweight and sturdy, weighing just 40 grams. Its overall light path length is 10.0 mm, ensuring precise compatibility and optimal performance for your astrophotography needs.