Reviews and Problems with Sigma 4.5mm F2.8 EX DC CIRCULAR FISHEYE HSM
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4.5 mm f/2.8 EX DC CIRCULAR FISHEYE HSM
24 November 2009
Conclusion: The Sigma 2.8/4.5 is an extremely interesting lens – as befits the first device in its category. It is an excellent instrument to play with photography and you will have plenty of fun if you try to take a portrait of somebody by putting the front element near the nose of your victim.
Cons: chromatic aberration too high at the very edge.