How can I test a lens that I just purchased?

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beameup Regular Member • Posts: 258
How can I test a lens that I just purchased?

I just bought 2 m4/3 lenses by mail-order.  I took some photos with the Lumix 20mm f/1.7 and some photos with the Olympus 45mm f/1.7.  On DxO, they seem to be very similar in overall score, however the 20mm clearly seems to be much sharper in the few photos I've taken.  I've been looking for a good brick wall to take pictures of in order to compare the two lenses.  Are there any other ways to determine more precisely how good the lenses are and determine if I got a "dud" with the 45mm lens?

 beameup's gear list:beameup's gear list
Olympus E-510 Olympus E-M1 Olympus E-M5 II Olympus Zuiko Digital ED 14-42mm 1:3.5-5.6 Olympus Zuiko Digital ED 40-150mm 1:4.0-5.6 +5 more
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