Focusing Screen EC-1D Black Mask
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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.
Offer valid September 1, 2015 12:00 a.m. through December 31, 2015 11:59 p.m. ET. Offer valid in U.S.A. only, and void where prohibited, taxed or restricted. Availability of certain items may be limited. Limit of ten of any one item per order, subject to availability. Offer not valid on bulk orders. Order will be shipped to a street address in the 50 United States or the District of Columbia only. Dealers, distributors and other resellers are not eligible for this offer. Offer subject to Canon Online Store Terms of Sale.