| Joined: | Thu Apr 5th, 2012 |
| Location: | Goose Creek, South Carolina USA |
| Posts: | 418 |
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Squarerigger wrote:
This may be a dumb question Eric, but how did ACS check the sharpness of the lens? What type of testing did they use if you were privy to such information.
Not absolutely sure as I know they use manual and digital methods.
But I would have thought using standard Modulation Transfer function charts.
Interestingly, I need to ask them about Chromatic aberration. I am convinced one of my lenses is worse than when I bought it.. with more colour fringing. I haven't knocked it so I don't know if CA can drift??
Thanks Whiteiris, aka Eric, I took the term modulation transfer function and went looking on the internet for some education. I found several sites which were helpful with one in particular http://www.normankoren.com/Tutorials/MTF.html.webloc.
Always learning.
Last edited on Wed Apr 18th, 2012 13:39 by Squarerigger
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Gary