![]() Article on how to measure MTF with a star chart.Useful resource for finding pixels to crop from:.The MTF_*.ipnyb files in sample_analysis contain sample analyses I have done using both the MTF and ImgLinearity classes. ![]() The utilities folder contains some custom utilities I've created to facilitate sharpness, resolution, and linearity metrics in various projects. Star Test Chart For setting camera back focus Ideal for use with ZEISS CP.2 lenses 28.00. Set the distance ring to the test distance according to the tables in the appendix. Decentering Test - Zeiss Star Chart I read how some E-mount lenses have some decentering problems (particularly the zeiss 16-70 and zeiss 12mm) and wanted check whether any of my lenses have significant problems. Activate the live view of your camera, select the maximum magnification. SHOP.COM UK is the one-stop-shop that helps you buy your favourite brands & products from hundreds of UK merchants, with one simple, secure account & shopping basket. The MTF class takes a cropped image containing only a Siemens star chart, and the ImgLinearity class takes an X-Rite ColorChecker chart and utilizes the colorimetric data found here to create linearity plots for R, G, and B channels in an image. 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. MTF and image linearity functions are implemented in MTF.py and ImgLinearity.py.
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