Mount the camera and lens on a tripod and level the camera, making sure that the centre of the image is aligned with the centre of the Siemens star. It is used qualitatively to demonstrate focussing effects, optical astigmatism and for. I place these files into the public domain and make no claims for their accuracy or ability to allow a camera to focus on them. Fasten the Carl Zeiss test chart on a wall at the appropriate test distance (see tables on page 12 16 the test distance is depending on the focal length) and ensure that the illumination is bright and uniform. 3 Star Test Target Also known as Siemens star or sunburst pattern. The links are:įor the Illustrator 'source' file (1.1Mb) The target should print onto an 8.5x11 sheet of paper. If the lens is in proper alignment and pointed directly (lineup isn’t critical, you can eyeball it) at the star, the white and black circles remain circular as they blur. I've made available a similar target in Adobe Illustrator (CS6) and in PDF format. Zeiss Siemens Star Chart If you manually defocus the lens just a bit, the star rays and the white and black circles in the center blur, of course. I believe those charts are expensive and/or copyrighted. In the video clip, the author refers to a 'Siemens Star' chart. With all the concern about D800 focusing, I thought I would contribute to the 'war effort' by making a focus target similar to the one referred in the blog posting at the centre of the image is aligned with the centre of the Siemens star. It is much easier to tell if the text is blur or sharp than some random patterns. In this manual we take a Lightweight Zoom LWZ.2 15.5-45mm/T2.6 with EF mount.

Zeiss siemens star chart pdf