Photography skills of Canon 550dnf-s18-135 lens

Try not to use the two focal ends. Closing the aperture by 2-3 stops will improve the sharpness and reduce the purple fringing. Specifically, at the wide-angle end, the best imaging is around F5.6, and the imaging effect begins to decline after F10. At the telephoto end, it is recommended to use an aperture in the range of F8-F11. The purple fringing will be significantly reduced after F5.6 at the wide-angle end, and the vignetting at the telephoto end will be significantly reduced after F10. However, it is best to test the lens yourself under fixed conditions. After all, the effects of different cameras are not exactly the same. You can search for "focus test card". In addition to the scale for testing focus, there is Neatly arranged black and white blocks can be used to measure purple fringing and distortion. Just take multiple shots at different apertures and focal lengths to see the effect. There is also the issue of focus running, which is very critical. If the focus is running out, the probability of producing a good film will be greatly reduced. Search for the focus running test card and follow the tutorial to see it. It is not complicated. In fact, as long as the above problems are not too serious, they can be corrected in post-production. Therefore, if you want to come up with a good film, in addition to good early-stage shooting, post-production is very important.