[ogl]

My opinion about both lenses at least at f=20 mm and wide open is the following:
1. Lim outperforms the DA* in the corner sharpness, overall contrast (look on the sky!) and some color saturation (look on the railcars).
2. DA* outperforms Lim in the center sharpness, but not in the corner because great CA.
I will resume testing the lenses this week also. Is the "test image" with night railroad station enough good?

The faultless lens can't has sharper corners than center.

[repaap]

So you do not think that this could be field curvature, which is causing it? shooting f 2.8 @ 20 mm.? because some shots center is sharper, but edges are softer?

[ogl]

maybe

[Grokh]

Could you compare the lenses at 40mm?

Yes, of course! I will do it on both 30 and 40 mm. And also closed, not only wide open.

[Grokh]

The faultless lens can't has sharper corners than center.

I did not say that corners are sharper than center by the one lens. I did say that the center is sharper by the DA* 16-50 but corners are better by the Lim 20-40. And the difference between the center and the corners by the Lim 20-40 is not so great as by the DA* 16-50.

[Franc]

you mean to say that the sharpness is more consistent along the frame then the 16-50?

[Grokh]

DA20-40 is not sharp at the center, but sharp at corners - it means that this lens has decentering.

When I look on the notebook's screen images I can't say the 20-40 is "sharp at the corners". In my opinion it is " a little bit softer in the center, a little bit sharper in the corner" as it's competitor.

[Grokh]

you mean to say that the sharpness is more consistent along the frame then the 16-50?

Yes, exactly.

[ogl]

I did not say that corners are sharper than center by the one lens. I did say that the center is sharper by the DA* 16-50 but corners are better by the Lim 20-40. And the difference between the center and the corners by the Lim 20-40 is not so great as by the DA* 16-50.

My eyes says that 20-40's center at 20 mm is worse than 20mm's corners.

[Grokh]

My eyes says that 20-40's center at 20 mm is worse than 20mm's corners.

No. Look please on the notebook screen.

[Grokh]

Well, colleagues, the same railroad station, the same lenses. At 30 mm, both 3.5.
HD Lim 20-40, F=30 mm, wide open (3.5)

http://farm3.staticflickr.com/2848/11406224143_4e005427d4_o.jpg

DA* 16-50, F=30 mm, 3.5

http://farm6.staticflickr.com/5510/11406109624_087eeb9300_o.jpg

[Grokh]

And for the end at today - 40 mm both, 4.0.

DA* 16-50, F=43 mm, 4.0

http://farm4.staticflickr.com/3668/11406369553_8c1b925339_o.jpg

DA Lim 20-40, F=40 mm, wide open (4.0)

http://farm4.staticflickr.com/3703/11406368103_6326ab09d7_o.jpg

[Grokh]

At least for today: notebook screen at F=40 mm.

DA* 16-50, F=42 mm, 4.0

http://farm4.staticflickr.com/3763/11406391565_fba0c57c99_o.jpg

HD Lim 20-40, F=40, wide open (4.0)

http://farm3.staticflickr.com/2807/11406393166_d6f93ffa78_o.jpg

[Grokh]

I am very sorry, colleagues, but there are nothing more for today. Sorry, I am extremely busy this week.

[Grokh]

Sorry again. Small gift to you. Three lenses (DA* 16-50, Sigma EX 10-20 and HD Lim 20-40) at 20 mm and 5.6. The same railroad station.
DA* 16-50, F=20 mm, 5.6

http://farm4.staticflickr.com/3764/11406809283_3c3c4e6cd4_o.jpg

Sigma EX 3.5/10-20, F=20 mm, 5.6

http://farm4.staticflickr.com/3726/11406657295_7cd1e1af82_o.jpg

HD Lim 20-40, F=20 mm, 5.6

http://farm8.staticflickr.com/7457/11406793273_d508d3bd7c_o.jpg