Assuming you have a camera and lens in good calibration and you are getting an accurate indication of focus by the AF system, then what?Īt this point you have to decide just how much effort you want to put into measuring the optical characteristics of your lens. To do that you have to do some focus testing as I described in the article HERE. Well, you have to be sure that the lens is focusing properly. So you have the camera on a tripod, what's next.

If the shutter speed is high enough and your hands are steady enough, you may get a critically sharp image, but don't bet on it happening every time. Photographers don't realize that hand holding a camera (even if it or the lens has image stabilization), isn't the way to get the maximum possible sharpness.

Well, unless you're shooting a static subject with the camera and lens on a tripod, it probably doesn't mean much. Probably the most frequent complaint or cause for concern about a lens is that it's not sharp, but what does that mean? Part 6 - Lens Testing for Resolution, Chromatic Aberration and Distortion

Siemens star chart pdf