Quote:
However ISTR the corrections applied by the Oly software are limited to vignetting and distortion; provided the lens does not have particularly appalling characteristics in these respects, these corrections will not generate significant artifacts, nor will they affect resolution, colour correction etc. to any significant extent. The most likely side effect of these corrections from an image quality point of view would be to push up the noise in the lightened corners of an image when correction for significant vignetting is applied.
The software correction for 'Vignetting' as far as I can tell is called "Shading Comp" and is user selectable, (Off/On) As such I suspect it doesn't apply to RAW files and equally doesn't apply unless you use Olympus software. In that respect it's similar to "Noise Filter" which can be set to Off/Low/Standard/High but again only works if shooting jpeg or on RAW files converted in Olympus software. Converting RAW files in 3rd party software effectively means the noise filter if Off. My guess is that the same applies to vignette correction. I can't find anything about 'Distortion' in the camera menu but it does appear as an option in Olympus Master when working with jpeg.
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Re: Shock! Horror!