EF-S 17-85mm f/4-5.6 IS USM Resolution and MTF Data

Methods used to calculate resolution and 50% MTF are here except the 20D was used on this pattern.
Resolution curves were calculated on large fine jpg's. Tabular data was calculated from RAW images processed with Canon DPP which generally gives higher resolution than from in camera large fine jpg's.

20mm f/8 Center of Field
Resolution (lp/mm)		 Edge of Field
Resolution (lp/mm)		 Center of Field
50% MTF (lp/mm)		 Edge of Field
50% MTF (lp/mm)
EF-S 17-85mm f/4-5.6 62 62 30 36
EF 20mm f/2.8 62 62 37 40
EF-S 18-55mm f/3.5-5.6 62 55 32 33
EF 17-35mm f/2.8L 55 49 33 33
Sigma 12-24mm f/4.5-5.6 DG HSM 55 55 30 36
35mm f/8 Center of Field
Resolution (lp/mm)		 Edge of Field
Resolution (lp/mm)		 Center of Field
50% MTF (lp/mm)		 Edge of Field
50% MTF (lp/mm)
EF-S 17-85mm f/4-5.6 55 62 30 35
EF 35mm f/2 62 55 35 35
EF-S 18-55mm f/3.5-5.6 55 62 29 36
EF 28-135mm f/3.5-5.6 IS 62 62 32 40
85mm f/8 Center of Field
Resolution (lp/mm)		 Edge of Field
Resolution (lp/mm)		 Center of Field
50% MTF (lp/mm)		 Edge of Field
50% MTF (lp/mm)
EF-S 17-85mm f/4-5.6 55 49 33 36
EF 85mm f/1.8 62 55 36 33
EF 28-135mm f/3.5-5.6 IS 55 55 33 37

Report Index

© 2004, William L. Castleman
Posted 4 October 2004