Compared with the SAL1870 the Sigma 17-70 is disappointing

Compared with the SAL1870 the Sigma 17-70 is disappointing

Sigma 17-70mm 2.8-4.5 DC Macro Lens for Minolta / Sony (electronics)

Customer Review

I ordered the lens due to the relatively high light intensity and because Sony is designated 18-70 in many Forums Shard. Have been but schwehr disappointed. Only the processing, metal version is really good. There's a star.

I have the lens times subjected to a test as I have photographed a large calendar with Linen of 1m size, here are my results:

- From 17-35mm strong distortions barrel shape but from 35-70 mm almost distortion (for the 2nd star).
- Compared with the Sony the results are approximately 1/2 to a stop level too dark.
- The Sigma seems a bit to focus precise will, probably due to the slightly higher light intensity. But needs a little longer as the transmission in the lens is probably translated longer.
- The worst part, however, is the edge blur. If I have to stop down at least 8 panel. To get at 17mm sharp edges, I benötge no intensity of 2.8. Although the Sony, however, has only just begun with an aperture of 3.5 at is there but on the edge already relatively sharply and at an aperture stage more knackscharf.
- The Sigma is to use really only in the range of 35-70mm. But there are other and better alternatives.

But I have decided to keep me now my SONY and give the Sigma back.

The eight stroke of the clock Rank: 5/5
March 21
How good idea Rank: 5/5
September 30
Cute, nice for a small gift! Rank: 5/5
February 22
To avoid ... 478 Rank: 1/5
April 1
great product !! 773 Rank: 5/5
July 3

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