Slanted Line Tests on the Canon SX30

Started 9 months ago | Discussions thread
Stephen Barrett
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Re: Slanted Line Tests on the Canon SX30
In reply to J C Brown, 9 months ago

Thank you for your comments, Jimmy.

The positive and negative overshoots that you mentioned are what I have been calling "halos". Several references that I cited attributed these to sharpening, and you do as well. I have had suspicions that there might be other causes for the halos besides sharpening, and suspected that lens aberration might be another cause. The sharpening for my tests was set to -2 (the lowest of 5 steps from -2 to +2, where the default value is 0). I have been trying to find out whether or not the minimum sharpening level means no sharpening. Your reply seems to indicate that you do not feel that aberrations are involved and that there is still some sharpening being applied, even at the minimum setting.

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