|Introduction | Sigma 18-200 mm f/3.5-6.3 DC OS HSM II lens performance | Sigma 18-200 mm f/3.5-6.3 DC OS HSM II vs competition: Sigma vs Nikon | Sigma 18-200 mm f/3.5-6.3 DC OS HSM II vs competition: Sigma vs Canon | Conclusion|
With DxOMark scores of 11 and 12 points, respectively, the two mounts are identical. (The difference in scores reflects a slight difference in sharpness at 18mm.) Overall, the image quality score is quite low. Unfortunately, super-zooms are not noted for optical quality and this Sigma 18-200 is no exception. Note that the DxOMark score indicates only the maximum score that you can obtain with this camera-lens combination under relatively low-light conditions (150 Lux, 1/60s).
If you look more closely at the bar graphs indicating the minimum and maximum scores attained, you may well be concerned about the overall image quality for this lens. And indeed, such fears may seem justified, given that as soon as one makes use of focal lengths greater than 85mm, the score drops to less than 5. But this phenomenon holds true for most super-zooms, so don’t dwell too much on this point — just keep in mind, again, that super-zooms and high image quality rarely mix.
The strong points of the Sigma 18-200mm F3.5-6.3 II DC OS HSM:
The weak points of the Sigma 18-200mm F3.5-6.3 II DC OS HSM:
Over the course of 7 years, Sigma has brought out three different versions of its 18-200mm lens, reflecting a fairly significant ergonomic evolution each time:
We also note that the diameter of the filter port changed between the two first versions. This third version returns to the original port filter diameter.
Evolution of the Sigma 18-200mm (from F3.5-6.3 DC to F3.5-6.3 DC OS):
Evolution of the Sigma 18-200mm (from F3.5-6.3 DC OS to F3.5-6.3 II DC OS HSM):