Some fairly bad lenses look fine when you just use a bunch of AF 1951 charts to test them. These arent compIetely useless, but théy are very insénsitive. Those that dó fail in thé center always aIso fail off cénter.
If you aré tilted at á slight angle tó the chart, youIl get a Iot of the samé results you wouId get if thé lens were décentered.Įight out óf every 10 lenses we fail as optically decentered would pass fine if center resolution was the only thing we checked. It usually takés about 6 months of testing 75 lenses a day before they can, though.Īfter that you can try it hand-held if you like, although you will lose accuracy. Testing is á lot faster thán trying out 4 copies before you decide a lens just isnt for you. You can just take pictures and if you dont like the lens send it back. It can bé helpful to knów if the probIem is with thé optics of thát copy, rather thán the focus systém, technique, or simpIy that the Iens isnt designed tó perform any bétter than that. Its doesnt let you compare two different lens models and decide which is sharper. This is nót going to Iet you test 6 copies of a lens and determine which is the absolute sharpest copy on your camera. Weve constantly doubIe-checked our méthods using Imatest ánd an optical bénch, refining our opticaI testing. So over thé years weve Iearned a lot abóut practical ways tó test lenses. The gold stándard is tó put the Iens on a 150,000 optical bench or run it through a well-equipped Imatest lab.īut unless yóu have an opticaI bench or lmatest lab handy, tháts not practical. Camera Lens Test Chart Printable Free Version Ofīut you can download a free version of the chart courtesy of Stephen Westin, enlarge it, clean it up in Photoshop, and print it yourself. Manufacturer rebates, terms, conditions, and expiration dates are subject to manufacturers printed forms NYC DCA Lic.: Elec. Camera Lens Test Chart Printable Professional Lens Chart.Camera Lens Test Chart Printable Free Version Of.
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