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Old Aug 14, 2010, 6:16 AM   #1
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Default Testing sigma 10-20 icw hdr

Hi all,

I recently bought the sigma 10-20. Wasn't able to play much with because my girlfriend took it with her to Prague. She got back this week so I finally got the chance to test it.

I went out yesterday and took some pictures, I must say it's a wonderful lens. I really enjoy the ultra wide angle. Colors seem to be very nice. And it's also quite sharp, even when it's not stepped down that much.

Anyway here are some of yesterdays pictures.
I only made them hdr, no further pp was done (yes I know I should)
Hoping to hear your thoughts on them.

Cheers,

Carlo
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Old Aug 14, 2010, 6:30 AM   #2
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I have this lens too and as you say .. it's a superb lens. A really nice set ..... but all a touch under-exposed. I found it hard to decide on a favourite but in the end I'd say #4 because it is so different and interesting ! There is possibly a dust spot on your sensor too.
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Old Aug 14, 2010, 6:39 AM   #3
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I believe you're correct about the dust. Not sure if it's on my sensor or on my lens.
The underexposure could be due to the hdr processing, since I used brackets of -1,5 0 1,5 so there has to be the right exposure there somewhere right ?
Now I'm viewing it on a different monitor and the photos do look darker than on my home pc.
Do you have any tips regarding the lens? I heard the sweet spot was around f8.

Have a nice weekend
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Old Aug 14, 2010, 7:23 AM   #4
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If the dust is on your lens it probably wouldn't show up in the photo. Unless it was a dollop of that agricultural mud we can see in the background !

Yep I think that's about right (F8) but I have no problem using it wide open too. Try it with anything you can think of ... it's a very flexible lens. It's even good for full body shots outside when standing just a couple of yards away ! Great for architecture / landscapes / car shows and lots more !
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Old Aug 14, 2010, 12:09 PM   #5
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I'm usually not a cityscape guy, but number 1 is quite striking.
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Old Aug 14, 2010, 5:43 PM   #6
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Hey, JC.
Thr closest I come to that lens is the DA 12-24mm a very similar lens.
There is a free software program that works wonders on the distortion of wide angle lenses. I can't remember the name of it for the life of me since I can't use it with 64 bit windows 7 but, I'm sure somebody here might jump in with the name.
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Old Aug 15, 2010, 4:55 AM   #7
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I'm on 64bit w7 also, so probably I can't use it either. Or maybe in compatibility mode.
Thanks pboerger, for your kind words
Next Tuesday I'm going to Brazil, so hopefully I get even more striking photos
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Old Aug 15, 2010, 5:44 AM   #8
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Frogfish, you were right. Indeed there was some dust on the sensor. But I managed to clean it (first time I did that so it was a bit scary).
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Old Aug 15, 2010, 4:22 PM   #9
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Quote:
Originally Posted by Goldwinger View Post

There is a free software program that works wonders on the distortion of wide angle lenses. I can't remember the name of it for the life of me since I can't use it with 64 bit windows 7 but, I'm sure somebody here might jump in with the name.
In my PSE6 at the top of the Filter menu there is a "correct camera distortion" feature (can't remember if it is original or a plug-in). It won't work well if you frame your subject too tightly with the 10-20mm lens, as you will cut off essential elements of the picture when you make a crop, as the following two pictures will show (HDR with HDRtist - I couldn't crop this one without cuttinoff the nose of the plane):

1

Name:  IMGP0392,3,4.jpg
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Size:  98.6 KB


2

Name:  IMGP0392,3,4 copy.jpg
Views: 1253
Size:  84.0 KB

And here is JC's 3rd image corrected and lightened a bit:

3

Name:  Untitled-1.jpg
Views: 1289
Size:  145.7 KB
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Old Aug 15, 2010, 4:33 PM   #10
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My favorite is the first one, but all of them are very nice. I like the HDR versions, they came out very well. It's easy to get rid of the dust spot on the pictures, depending on what processing software you use.
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