Nikon WP-N3 Waterproof Camera Housing for $99 + free shipping
BuyDig offers the Nikon WP-N3 Waterproof Camera Housing for $246. Coupon code "DIVE" cuts it to $99. With free shipping, that's the lowest total price we could find by $274. It is compatible with the Nikon 1 J4 and S2 cameras and has a depth rating of 147 feet.
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