Maffer kirjoitti:Canon ei ole. R-lasit nimittäin.
Nope.
Rudy Winston, Canon U.S.A shares:
"Distortion correction is nothing new in digital imaging, of course – we’ve seen it both in-camera, and certainly in software, for some time."
"Usually, it’s done to minimize typical levels of either barrel or pincushion distortion. While many lenses nowadays are designed to allow some of either to creep in – with the assumption that in today’s digital world, it’ll be correctible for critical users – normally, the levels of UNCORRECTED distortion are still within what at least casual viewers would consider “acceptable.”
"However, with the RF 24-240mm lens, to get the 10x zooming, size and weight, full-frame coverage, and good levels of overall sharpness into a package that sells for under $1,000, apparently (and this is ME speaking – not a formal comment from either Canon or the Lens Development Group in Japan), the decision was made to allow very extreme levels of distortion to occur at the 24mm position, and to apply correction via detailed Lens Profiles either in-camera or (for RAW images) at the computer. And, I’m told that Canon worked aggressively with Adobe to be sure to have the right profiles available to customers using Lightroom or ACR as soon as possible."
"Anyhow, consider it a very strong form of distortion correction. Using an older version of something like ACR/Lightroom, if you shoot a RAW file and view it within that software, files shot at or near 24mm with this lens will look almost like a terrible imitation of a fisheye lens, complete with hopeless vignetting and so on. So it’s apparent that the lens profiles REALLY make a difference here. It’s no accident that when the lens is attached to the EOS R or RP cameras, that Distortion Correction is always on, and grayed-out (you cannot turn it off, in-camera)."
Brace yourself. We're going to look behind the curtains and this is going to be painful. Here are the uncorrected test results from our standard distortion test (captured at f/8).
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Caanoni ei nyt ole kovin montaa R objektiivia edes tuonut ja nekin harvat kalliita, joilta voi odottaakin vähäistä korjauksien tarpeita.
Canonien EF laseissa on jo harrastettu softakorjauksia, ei ole mitään syytä olettaa, että Cänon pysyisi erityisen puhtoisenapoikana tässä asiassa. Varsinkin apsc croppilaseissa, joita tämänkin ketjun Sony E 16-55mm F2.8 G edustaa.