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C-4 Precision Optics releases $39,000 4.9mm F3.5 Hyper Fisheye lens for Sony E mount: Digital Photography Review
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Amazon.com : Rokinon FE75MFT-B 7.5mm F3.5 UMC Fisheye Lens for Micro Four Thirds (Olympus PEN and Panasonic), Black : Compact System Camera Lenses : Electronics
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