They write here that whale lenses do not provide proper quality - in my opinion this is not so. I tried different ones, both whale ones and not - the quality of the photos is almost indistinguishable (in the opinion of an amateur, not a professional, although I have been photographing for more than 30 years). Photography, it seems to me, is not a search for aberrations in the resulting images, but the composition and idea of the frame. This camera fully justifies this goal for such a price. Regarding the difference between the image on the preview and the computer monitor - so you need to use monitors with calibrated color reproduction, that is, professional ones, then believe me there will be no difference.
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