This content has been marked as final. Show 4 replies
"smallest apputure [sp] I can get..."
Read up on diffraction limits...
You might want to bring this up over in the Photography forum at http://www.adobeforums.com/webx/.3bb41392/
But, as Thomas notes, small apertures will degrade your image. It could also be the lens. Do you have access to another similar focal length range lens to test with?
Yes John, I have heard of defraction before. I think I may have to look into this a bit more.
Though just reading quickly, Why don't lens manufacturers stop their lenses. Eg: Why say a car can go 250mph when it wobbles it's *** off, wouldn't you say it's spects are better at say 190 mph?
Sometimes you want the trade-off between greater depth of field and the abberations you get from stopping too far down. Each lens has an optimum aperture, usually around the middle of the scale. Wide open the lens suffers some abberations. Stopped down it suffers from others. At least we have choices instead of just one aperture setting (which is what you get on "mirror" lenses).