Introduction to Lens Focusing Test Card

The lens focus test card YE0110 is used to test the overall focus of the lens, adjust the lens, and check the back focus and resolution of each area of the lens. The test card consists of 9 fan-shaped stars, evenly distributed in various areas of the image. The white part in the middle of a fan-shaped star is 10% of its outer diameter. There are two circular lines inside the fan-shaped star, with the inner layer being a 625 line structure and the larger circular line being a 312 line structure.

The test chart consists of 9 sector stars, distributed equally over the picture area. The unresolved center of the sector star is 10% of its outer diameter. Within the sector stars are two circular lines. The inner one marks a 625 line structure, the larger circular line marks a structure of 312 lines.

The test chart is designed for

• adjustment of camera lenses
• checking back focal distance
• checking resolution over the picture area