The Holding Tank

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MTF Study

| Lens MTF Area Summary and Figure of Merit |

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28mm Region

| Average MTF | Worst Case MTF | Relative MTF | S to M Ratio |

 | Figure of Merit  | MTF Area Average | Conclusions |

Conclusion

f8

Difficult, the contrast running order is 24-70mm f2.8L, 24mm f2.8, 28mm f1.8, 28mm f2.8, 16-35mm f2.8L, the two EF-S lenses running in a poor last.  However the 16-35 II has much improved full frame edge performance

The new EF-S 17-55 f2.8 IS does not get away from the rest of the pack at this focal length.

For detail the 24mm f2.8 (for comparison) comes out best with the 28mm f2.8 a close second, the remainder all falling in together as joint third.  

Again the 24-70mm zoom has done well and out performs the other lenses except for satisfactory detail coverage where the 28mm f2.8 takes the crown.

The 16-35mm zoom does well for contrast coverage but lets itself down for detail coverage, even for a 1.6X crop factor sensor.

Thanks to David Littlewood for pointing out an error in the data from the Canon USA web for the 28mm f1.8. 

Max Ap

The 24-70mm again wins the contrast; the performance of the f1.8 is not bad considering the speed difference, where it is as good as the 16-35mm for much of the frame coverage.  

The new EF-S 17-55 f2.8 IS is very close to the other lenses.

As far as detail goes the 24-70mm zoom and the 28mm f2.8 are joint firsts with the 20mm f1.8 and 16-35mm zoom equal seconds. This is very impressive from the f1.8.

MTF Bokeh indicators are very good for all lenses out to about 19mm from the optical axis, a good performance for the f1.8.  

MTF Study

| Lens MTF Area Summary and Figure of Merit |

| MTF Data Overview | Photodo / Canon MTF Cross Validation | 

| Contax, Nikkor and Leica R lenses vs Canon | 

| List of Canon Data Comparisons | List of Photodo Data Comparisons |

| Database Download |

| Average MTF | Worst Case MTF | Relative MTF | S to M Ratio |

 | Figure of Merit  | MTF Area Average | Conclusions |

Last Updated 05/06/2008

All Content © 2005-09 Lester Wareham All Rights Reserved     

All material is supplied  as is and without warranty, use at your own risk.  

All opinions stated are the authors own.

All quoted information remains the copyright of the respective authors.

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