The 24mm World Cup
Group C: Regular f2.8 Prime Lenses
Sigma 24mm f2.8 v Pentax 24mm SMC-A: Performance at f5.6
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Sigma 24mm f2.8 SuperWide at f5.6 (centre)
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Pentax 24mm f2.8 SMC-A at f5.6 (centre) |
1 points
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1 points
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Level pegging. Interestingly, on a 350D, neither lens make a great leap in performance from f2.8 to f5.6 centre frame. The Pentax SMC-A once again seems to be a little more contrasty centre frame, with more neutral colouring, but the difference is pretty subtle and may have more to do with lighting variation than the lens.
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Sigma 24mm f2.8 SuperWide at f5.6 (corner)
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Pentax 24mm f2.8 SMC-A at f5.6 (corner) |
2 points
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1 points
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There is definitely a marked fall-off in resolution and contrast as we move even 10mm off axis with the Pentax. For comparison, here's how the Canon 24mm f2.8 (on a 350D) rendered the same section of the frame at f5.6, both with some Shadow & Highlight correction:
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Sigma 24mm f2.8 SuperWide at f5.6 (corner) |
Canon 24mm f2.8 at f5.6 (corner) |