Sigma A 135 mm f/1.8 DG HSM
11. Summary
Pros:
- Solid and stylish casing,
- Brilliant image quality in the frame centre,
- Sensational image quality on the edge of APS-C sensor,
- Sensational image quality on the edge of full frame,
- Lack of spherical aberration problems,
- Practically zero lateral chromatic aberration,
- Imperceptible distortion,
- Excellent coma correction,
- Slight astigmatism,
- Low vignetting on the APS-C.DX sensor,
- Silent and accurate autofocus.
Cons:
- Noticeable vignetting at the maximum relative aperture and on full frame,
- A tad too high longitudinal chromatic aberration.
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