The 4K Panasonic GH4 is here. You can even get 4K SDI out of this thing!
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Panasonic Lumix DMC-GH4 (Body Only) review: Panasonic gears up Lumix GH4 for 4K - CNET
Panasonic Lumix DMC-GH4 Review: Digital Photography Review
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Panasonic GH4 Camera - Body Only
Further Thoughts on Panasonic 4K GH4 - Updated | Filmmaker Magazine
Panasonic Lumix DMC-GH4 Review: Digital Photography Review
Panasonic Lumix DMC-GH4 / Sony Alpha 7S Comparative Review: Digital Photography Review
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Amazon.com : Panasonic LUMIX GH4 Body 4K Mirrorless Camera, 16 Megapixels, 3 Inch Touch LCD, DMC-GH4KBODY (USA Black) : Electronics
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Panasonic Lumix DMC-GH4 4K Mirrorless Micro Four Thirds Digital Camera Kit with 12-35mm f/2.8 ASPH. Lens USA | NJ Accessory/Buy Direct & Save
Panasonic Lumix DMC-GH4: Digital Photography Review
Shooting 10-bit 4K on the GH4 | How to Shoot 4K 10-Bit GH4 Tutorial Video - YouTube