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24-70 2.8 L vs. kit lens...unexpected results?

Started Dec 7, 2014 | Discussions thread
cberry Senior Member • Posts: 1,127
Re: 24-70 2.8 L vs. kit lens...unexpected results?

Dave,

were both shots taken in live-view at the same ISO? Same focal length?

Curious. Seems the full scene shot is slightly front focused. I'm not sure that the scene itself is able to produce a sharpness comparison unless we're comparing the same object in perfect focus.

E.g. if 1 lens needs an MFA of +8 to be sharp and the other -8, the charts on the wall will be equally in-focus but foreground and background objects will be progressively sharper with one or other lens.

Another thought is to shoot both lenses where they are both performing at their best.

I went and compared the sharpness charts (the Mk 1) on DXO at all the ranges and there's a minor difference of 25% (yes that's minor) between them. Slight focus difference I think can account for that.

Copies also vary but you should see a difference - just not a major earth-shattering one.

cb

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