Best Fisheye lens

[crazybee]

Right then folks, Which is the best or what is the difference between these Fish Eye lens for Digital Rebel

Canon EF Fixed Focal Length Lens 15mm f/2.8 Fisheye

Sigma 8mm F3.5 EX DG Fisheye

Sigma 15mm F2.8EX Diagonal Fisheye

These are in order of expense with the most expensive at the top

x-posted canoncameras, fisheye_photos,photographers, photographs,

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