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<blockquote data-quote="480sparky" data-source="post: 233271" data-attributes="member: 15805">I test every lens I own.I set it up on a tripod in the back yard.&nbsp; I take a shot for every full aperture available and, if it's a zoom, for every focal length marked on the barrel.I then pixel-peep the results.&nbsp; I grade each image on sharpness on a scale of 1-10, both in the center and at the corner.&nbsp; I then create a chart that I convert to a .pdf so I can store &amp; view it on my phone if I need to.&nbsp; Each chart will show me the sharpest aperture for that lens, which apertures are 'good enough', and which ones to avoid.&nbsp; I also color-code the results so it's easy to see.&nbsp; Green = my first choice.&nbsp; Blue is still acceptable.&nbsp; Orange.... well, OK, I can live with it if I have to. Red.... avoid at all costs.I do not rely on anyone else's testing.... their copy may differ from mine.Here's a sample:<img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/SweetSpot.jpg~original" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

[QUOTE="480sparky, post: 233271, member: 15805"] I test every lens I own. I set it up on a tripod in the back yard. I take a shot for every full aperture available and, if it's a zoom, for every focal length marked on the barrel. I then pixel-peep the results. I grade each image on sharpness on a scale of 1-10, both in the center and at the corner. I then create a chart that I convert to a .pdf so I can store & view it on my phone if I need to. Each chart will show me the sharpest aperture for that lens, which apertures are 'good enough', and which ones to avoid. I also color-code the results so it's easy to see. Green = my first choice. Blue is still acceptable. Orange.... well, OK, I can live with it if I have to. Red.... avoid at all costs. I [I]do not r[/I]ely on anyone else's testing.... their copy may differ from mine. Here's a sample: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/SweetSpot.jpg~original[/IMG] [/QUOTE]

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