The eTone Hasselblad Dark Slide Film Back Focus Knife is a precision-crafted metal accessory designed specifically for medium format film photography enthusiasts. Compatible with Hasselblad 500CM, 503CW, and 555ELD camera bodies, as well as A12, A16, and A24 film backs, this essential tool ensures seamless film back handling and operation. Constructed from durable metal, it features precise alignment and a light-tight construction that prevents unwanted exposure, keeping your film safe and your shots pristine. The distortion-free design guarantees reliable performance shot after shot, making it a dependable addition to your Hasselblad system. Whether you are a seasoned professional or a dedicated film photography enthusiast, this dark slide holder and back bracket delivers the accuracy and durability that Hasselblad users demand. Its robust build ensures long-lasting use, even under the rigors of regular studio or field work. Upgrade your medium format setup with this reliable and well-engineered camera accessory.