CellularFactory.com offers this 18mm Rubber Eyecup for Canon Cameras for $2.59. With free shipping via coupon code “12RD21″, that’s the lowest total price we could find for such an item by $7. (For further comparison, a similar, name-brand model goes for close to $30 at other retailers.) The eyecup attaches to the viewfinder, minimizing extraneous light and vision fatigue. It’s compatible with many Canon EOS and EOS Rebel cameras.
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