How to test the sharpness of a lens?


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eejal

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May 4, 2005
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End of the Line
#1
If I were to get a new lens from the shop, how do i know if i'm getting a sharp copy guys? bring my cam and laptop along to test? what shld i look out for?
any tips apart from looking for scratches etc? :embrass:

T.I.A!
 

Octarine

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Jan 3, 2008
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Pasir Ris
#2
Google for Focus Test Charts, follow the instructions. Alternatively people have described a method using 3 batteries in a row. Search the forum.
 

Reportage

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Nov 24, 2008
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#3
sharpness differ from people to people as they all got different eyes. what you want to check for is front or back focusing problems.
 

giantcanopy

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Feb 11, 2007
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SG
#4
Get from a familiar shop , test shoot a few shots and check the focusing accuracy by chimping a little. I also look for smooth manual focusing. Then buy. You can always go through a thorough check at home, and any other problems send back the following day. ( Oh of course check for the exchange policies with the shop ) I dun usually spend an elaborate amount of time checking during the purchase..

Ryan
 

Headshotzx

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Dec 14, 2007
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Punggol
#5
Shoot text and view on a good LCD screen (camera or laptop)/
 

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