Panasonic Leica DG Summilux 15 mm f/1.7 ASPH
5. Chromatic and spherical aberration
The Panasonic Leica DG Summilux 15 mm f/1.7 ASPH doesn’t correct the longitudinal chromatic aberration in a perfect way. Its influence is visible both at the maximum relative aperture and on stopping down by 1EV although the stopping down does reduce the level of the aberration. Still you can’t say there are huge problems – you can notice the aberration but its level will be hardly bothersome.
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It would be difficult to have any reservations concerning the level of the lateral chromatic aberration. Near the maximum relative aperture its value reaches about 0.09%, being medium. After stopping down you see that aberration decrease to low levels you don’t have to worry about.
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Spherical aberration
The spherical aberration doesn’t reveal itself as a ‘focus shift’ effect. The images of defocused points we got in front of and behind the focus differ a bit but not to a point of being a problem.
