Underwater

九州天下的网址it is possible to prepare a test chart for underwater use. film or inkjet test charts can be enclosed in glass or waterproof lamination. chrome on glass photomask targets can be fully submerged.

九州天下的网址the main challenge of an underwater camera test is to present a clear image of a test chart, without any reflections on the target.  this becomes very challenging when testing using a flat test target with a wide angle lens where on outer portions of the image, the angle between the camera and the test chart can exceed the

For wide angle九州天下的网址 underwater tests, it may be necessary to use separate that are pointed directly at the camera to test image quality on the outer portion of the imaging field.

has done significant work in testing underwater cameras, see his post: ““

Here is a video segment Pawel produced:  which features slanted edge sharpness analysis using SFRplus targets