LensTip.com

Lens review

Sigma C 18-300 mm f/3.5-6.3 DC MACRO OS HSM

28 February 2015
Arkadiusz Olech

11. Summary



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Pros:
  • useful focal range,
  • good image quality in the frame centre,
  • chromatic aberration corrected noticeably better than in the case of direct rivals,
  • proper correction of spherical aberration,
  • distortion correction better than that of the rivals,
  • moderate coma at longer focal lengths,
  • not especially bothersome astigmatism,
  • efficient image stabilization,
  • effective and sensible autofocus.

Cons:

  • weak image quality on the edge of the frame (apart from the 50 mm focal length),
  • noticeable vignetting at both ends of focal range.

If you launch a lens with parameters slightly worse than those of its direct rival and you still want to succeed there are two strategies available: make sure that your lens has either better properties or a lower price. The price of the Sigma is almost exactly the same as the price of the Tamron, just slightly lower than the price of the newer of the Nikkors – it is clear that the tested lens cannot win this way. Unfortunately when you look at its optical properties you find out the optical and mechanical properties of all three other lenses are very similar so there is not much of a difference between them. It leaves the versatility of the lens and there the Tamron has a clear advantage. The 16 mm focal length, when compared to 18 mm focal length, makes a huge difference and I admit that’s why I like the Tamron the best out of the four of 1x-300 mm lenses, tested by me so far and I am going to recommend it to all those interested in such megazooms.