Nikon DK-21 Camera Viewfinder Eyecup*2+Hot Shoe Level*2+Vacuum Cleaning Cloth*1 for Nikon D7000, D750, D610, D600, D300, D200, D100, D90, D80, D70, D70s

SKU: SKU.2233

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Prevents light from leaking in from the sides of the viewfinder, providing a darker field of view and a more focused view of the image in the viewfinder. 
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The viewfinder eyecup of K&F CONCEPT is made of ABS plastic. 
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For users who wear glasses so they can also see the image closely through the viewfinder. 
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The viewfinder eyecup does not affect the camera's sensitivity or autofocus performance, it simply acts as a physical barrier to help the photographer better see and compose the shot. 
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When using a telephoto lens, the viewfinder eyecup can help you get closer to the camera more steadily, reducing the impact of hand shake, which is very helpful in improving image stability. 
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Soft eyecups generally provide better comfort, especially during long shoots, while hard eyecups are more durable and stay put during intense or fast shooting situations.