05-16-2011, 09:24 PM
[quote name='Bryan Conner' timestamp='1305480013' post='8336']
Because of a recent problem with one of my lenses, I have been analyzing the sharpness of my lenses. . . . How can I easily determine what level of sharpness is acceptable. . . and when it should be sent in for adjustment? . . .
[/quote]
- well if you want a cheap check on how your lenses compare you can download a an iso12233 test chart from this site - [url="http://www.graphics.cornell.edu/~westin/misc/res-chart.html"]http://www.graphics..../res-chart.html[/url] -
it should print out A1 size at useful sharpness quality for a few dollars (except the blacks will be grey) - shoot it, pan it for the sides etc, to check the lens against a good lens -
not the super PZ test the guys here do, but useful for checking if what you've bought is what you hoped it would be -
. . . or you can buy a good quality, and more expensive, chart from imatest and other places
Because of a recent problem with one of my lenses, I have been analyzing the sharpness of my lenses. . . . How can I easily determine what level of sharpness is acceptable. . . and when it should be sent in for adjustment? . . .
[/quote]
- well if you want a cheap check on how your lenses compare you can download a an iso12233 test chart from this site - [url="http://www.graphics.cornell.edu/~westin/misc/res-chart.html"]http://www.graphics..../res-chart.html[/url] -
it should print out A1 size at useful sharpness quality for a few dollars (except the blacks will be grey) - shoot it, pan it for the sides etc, to check the lens against a good lens -
not the super PZ test the guys here do, but useful for checking if what you've bought is what you hoped it would be -
. . . or you can buy a good quality, and more expensive, chart from imatest and other places