Real world meets lab

NPhoto - - Test Team -

The lenses on test dif­fer in many re­spects, but we tested them in a con­sis­tent way

To test real-world per­for­mance, we use lenses in wide-rang­ing light­ing con­di­tions on a va­ri­ety of dif­fer­ent cam­era bod­ies. We check for good build qual­ity and han­dling, smooth and pre­cise oper­a­tion of zoom and fo­cus rings, and test the ef­fec­tive­ness and ac­cu­racy of aut­o­fo­cus and op­ti­cal sta­bilis­ers.

We also run a full range of lab tests un­der con­trolled con­di­tions, us­ing the Imat­est Mas­ter and DxO Anal­yser suites. Pho­tos of test charts are taken across the range of aper­tures and fo­cal lengths and an­a­lysed for sharp­ness, dis­tor­tion and chro­matic aber­ra­tions (colour fring­ing). A sum­mary of these re­sults is shown to­wards the end of the group test, but we also take data from a wider range of aper­tures and zoom set­tings into con­sid­er­a­tion. Fi­nally, we com­bine the lab tests and real-world shoot­ing re­sults to give over­all rat­ings.

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