Teleconverters have been a part of photography for decades. They’re a great way to effectively double the number of lenses you own by effectively turning each lens you own into two lenses. The native lens and one at double that focal length (or focal length range, in the case of zooms). But are they really worth it? And can you tell the difference between images shot with a teleconverter vs simply cropping the image?
In this video, Kevin Raposo analysed over 3,000 photos using a blur detection algorithm to see if there’s really any technical or visual difference in sharpness between cropping or using a teleconverter. And according to his tests, no, there really isn’t. Well, at least, not under all circumstances. In fact, the teleconverter shots actually proved to be a little sharper in some conditions.
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