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Venus Optics adds Canon M, Fuji X and Sony E mount options to its 4mm F2.8 circular fisheye lens: Digital Photography Review
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Amazon.com : Meike 6.5mm f2.0 Ultra Wide Circular Fisheye Lens Compatible with Canon EOS-M Mirorrless Cameras M100 M10 M6 M5 M3 M2 M50 M6II M200 : Electronics
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Amazon.com : Opteka 6.5mm f/3.5 Professional Ultra Wide Angle Aspherical Fisheye Lens for Canon EF-Mount EOS 90D, 80D, 77D, 70D, 60D, 50D, 7D, Rebel T8i, T7i, T7s, T6s, T6i, T6, T5i, T5,
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Amazon.com : Meike 6.5mm f2.0 Ultra Wide Circular Fisheye Lens Compatible with Canon EOS-M Mirorrless Cameras M100 M10 M6 M5 M3 M2 M50 M6II M200 : Electronics
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Amazon.com : Sigma 8mm f/3.5 EX DG Circular Fisheye Lens for Canon SLR Cameras : Camera Lenses : Electronics
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