charlesk wrote:
Actually, they are both. They are \"massive\" perhaps in the SOOC shots. But they are pretty much meaningless given that color adjustments are routinely made during RAW processing and editing, and those adjustments can easily compensate for any differences between \"styles\" in lenses. Even small changes to the sliders in a RAW program will have far bigger impact than the most dramatic differences you can find between any pair of comparable lenses.
Yes and no.
It\'s true that you can make far more dramatic differences by a simple pull of a slider. It\'s not true that you can compensate for the difference in the lenses. You can do certain things to reduce the difference, certainly - but those are very simple software emulations and can very rarely compensate for the real optical thing. The same way you can\'t increase resolution by using software sharpening, you can\'t improve color separation by increasing the saturation. When the information that contains the subtle variations in colors, you can\'t do anything about it. You can work with existing information, but not with information you don\'t have.
The same goes for a variety of parameters ranging from micro contrast to bokeh.
Now, even if we suppose that you could simulate the optical effects with PP it wouldn\'t do you much good as it\'s not one style for one lens. It will completely depend on aperture, focsuing distance, subject, light intensity etc How will you know how to post process if you don\'t have a sample shot with the other lens?
That of course is a hypothetical question as it can\'t be done even in theory. Here\'s the expanded MTF for three different Zeiss lenses. We\'re not talking about Zeiss vs Canon, but Zeiss vs Zeiss:
Look at just the two bottom rows - the 40 lp/mm MTFs. No mater how hard you try you cannot by any means using the ZE 35/1.4 and ZE 35/2 get to the high micro contrast for fine detail of the ZM 35/2. It\'s not possible as the information isn\'t there. Subsequently the three will render quite differently. If you have something with fine texture, use the ZM. If you on the other hand want high edge contrast, to make objects \'pop\', use the ZE 35/2. And so on.
Jun 07, 2011 at 08:25 AM
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