Real world meets lab

We com­bine rig­or­ous lab tests with real-world shoot­ing for the most ac­cu­rate re­sults pos­si­ble

NPhoto - - Test Team -

To test real-world per­for­mance, we use lenses in all sorts of light­ing con­di­tions, both in­doors and out­doors. We check for good build qual­ity and han­dling, smooth and pre­cise op­er­a­tion of fo­cus rings, and test the speed and ac­cu­racy of aut­o­fo­cus. In this case, all lenses were tested on both D610 FX and D7100 DX bod­ies.

We also run lab tests un­der con­trolled con­di­tions, us­ing the Imat­est Master suite. 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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