*IMPORTANT NOTICE: This product is Open Box and may have minor scratches or imperfections. It includes all necessary accessories, however may be missing some items found in the original packaging. It has been inspected, appears to be in good working condition, and comes with the full manufacturer's warranty. If you are at all unsatisfied with its condition, you may return it for a full refund or exchange.
The Canon EC-1D Black Mask Focusing Screen Set consists of two screens, one delineating a square format and the other a 4x5/8x10 format. The screens have an opaque black outside the aspect ratio area. Ambient and flash metering are affected when using the Black Mask screens. Automatic exposure is usable in partial, spot, or multi-spot metering patterns. When using E-TTL or E-TTL II autoflash with Canon EX Speedlites, only FEL (Flash Exposure Lock) together with partial or spot metering is recommended.
Note: Compatible camera models include EOS 1Ds, & EOS 1Ds Mark II.