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Amazing lens, incredible sharpness

Started Aug 20, 2013 | User reviews thread
Great Bustard Forum Pro • Posts: 45,641
Re: Dammit, Anders!
1

khaledgawdat wrote:

By 75mm 1.8 I mean that the lens I bought had a 75mm f 1.8 label on it and on the EP5 it is a 150 mm F 3.6 in terms of DOF but F 1.8 in terms of exposure

Sure, except exposure isn't a meaningful measure for cross-format comparisons: f/1.8 on mFT projects the same amount of light on the sensor as f/3.6 on FF for a given shutter speed, which means the noise will be the same for equally efficient sensors.

In other words, 75mm f/1.8 on mFT looks a lot more like 150mm f/3.6 on FF than it does 150mm f/1.8 on FF.

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