Designed exclusively for TTArtisan AF 40mm f/2 lens, this metal square lens hood screws on securely without interfering with the focusing ring or causing vignetting. Crafted from high‑quality aluminum alloy, it provides lasting strength and reliable protection against bumps, drops, and everyday wear. Weighing just 43.6 grams, it adds negligible weight to your camera with no impact on handling or portability. The square hood design effectively blocks stray light to minimize flare and ghosting, helping you enjoy richer colors and better contrast even in bright sunlight. It comes with a perfectly matched lens cap that keeps dust, moisture, and scratches away, offering more comprehensive protection for your camera.