Image Softness with Sigma 30mm f1.4 Wide Open

Started Mar 29, 2011 | Discussions thread
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Marvin Horlick
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Image Softness with Sigma 30mm f1.4 Wide Open
Mar 29, 2011

I have the Sigma 30mm f1.4 lens and there are threads on this forum talking about the lens being a little soft at its widest aperture; f1.4. Below is an 'edited' quote from an article I saw about shooting wide open with film vs digital sensors.

'There are several theories about lens behavior on digital cameras vs shooting on film. We can suspect that sensors collect the incoming light all the more improperly, in that this light comes in from a more oblique angle with a wide open aperature. Since faster lens have, by definition, wider openings, they raise the proportion of oblique light hitting the sensor'

Interesting theory. What are your thoughts on this issue?

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Marvin

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