EXCERPT page containing first few paragraphs. 2021-05-09 22:24:11
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The Fujifilm GF 30mm f/3.5 is exeamplary in its low distortion, having only a very low level of barrel distortion affecting the corners. Very few lenses of this field of view can do so well. Kudos for this aspect of optical design!
The good news with such low distortion is that distortion correction can be avoided most of the time, thus keeping the sharpness intact rather than having the degrading effects of distortion correction stretch-apart the pixels. And if it is done, the effect is primarily in the corners, where optical performance is at its poorest anyway.
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These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).
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