Picture Sigma 10-20mm

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Philx1979

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I took this picture last week, and the Exif data is as follows: ISO 100, f11, focal length 10mm. Image shot on a tripod in dull conditions.

Now i focused at the edge of the rock where the water was splashing over.
Now if you look at the rock in the upper right hand side it is hazy, out of focus, soft looking.

Is this normal of the Sigma 10-20mm or is it a dreaded soft copy (right hand softness) or is it simply that i should have used a higher aperture than f11 say more like a friend recommended f16 maybe more?

Although i am really happy with the picture just wanted to ask some more experienced people about the lens. As its a beast of a lens that needs to be learned properly:)

3390379209_0e73d82633.jpg


link to 100% crop http://www.ruberry.co.uk/rockybyphilx.jpg

Link now working `V8burble`
 
At that focal length f/11 should be more than enough to focus to infinity :shrug:

Edit:
(BTW your flickr page linked is showing as private)
 
Wonderful photo btw! Whereabouts is it taken?
 
hmmm....exif isnt showing camera data, what shutter speed were you on? I ask because there is a tiny bit of blurring even on focus point rocks that could indicate some camera movement, despite using a tripod. A windy day and/or just your finger pressure on the shutter button can be enough to cause this. TBH, this shot, though beautiful, is not a good test of a lens. You need to shoot something even and level in calm conditons, the usual test being a brickwall. Set the camera up absolutely so front lens elemenst are parallel to the wall, on a tripod and use a remote trigger or mirror lock up if possible, and shoot at several ranges across the focal length and at several f numbers for each length. Then compare. My undertsanding is that most lenses are at their optimum performance between f8 and f11.
 
I think you are absolutely right Yvonne, and camera shake, no matter how small will be exagerated the further from the camera you go.
 
Assuming you focussed on the pool of water in the centre of the image and not the ones nearer to you then its not that soft to my eyes - the darker rocks to the right of the centre of the image are fairly lacking in contrast, the right half nearer to you where there is more contrast looks to be as good as the left.
 
Yv said:
hmmm....exif isnt showing camera data, what shutter speed were you on? I ask because there is a tiny bit of blurring even on focus point rocks that could indicate some camera movement, despite using a tripod. A windy day and/or just your finger pressure on the shutter button can be enough to cause this. TBH, this shot, though beautiful, is not a good test of a lens. You need to shoot something even and level in calm conditons, the usual test being a brickwall. Set the camera up absolutely so front lens elemenst are parallel to the wall, on a tripod and use a remote trigger or mirror lock up if possible, and shoot at several ranges across the focal length and at several f numbers for each length. Then compare. My undertsanding is that most lenses are at their optimum performance between f8 and f11.
Click to expand...

Thanks for your help Yv the Shutter speed was 1/15.

Anyone else with this lens give any info?
 
What's the serial number on the lens? Did you buy it new? When I bought it, I was adviced by a lot of people to avoid lenses with SN starting with 101-102, which was a range that had a few lenses with less than optimum performance. I bought that lens 3 years ago, and its SN started with 104, so if you bought it brand new (and if the store didn't just dump on you old returned stock) then it should be well off that point.

TBH, for this kind of shots I tend to focus on the closest third of the frame and use f/16 to be on the safe side. This way you can assure that your DOF reaches infinity.
Take for example this photo.
1083204-2-flowers.jpg

I can't remember the aperture used exactly (I think it was f/11) but since my focusing point was set on the flowers on the foreground, the trees in the distance are a bit OOF, so I should've used a smaller aperture for that. Not sure of the focusing distance for your shot was enough to give you enough DOF for that rock on the background, but since the horizon line isn't that sharp either, I would say that it's just down to technique, either camera shake or small DOF.

Do that brick wall test just to be sure!

Nice shot btw
 
Checked my serial number and it starts with 224 !!! done some more tests and f11 and f16 seemed to be the sweetest spots in terms of sharpness.
I think i`m just concerned about having a dreaded soft copy i know that some people have had either a left or a right hand sided soft copy but looking at my bench picture below that is sharp however i did use the right hand side focus point.

a couple more pics i done with the lens:
3390380867_9b889b4c34.jpg


3391194354_9fdaf54d7f.jpg


Not up to your standard yet Stylgeo! Your pics are awesome!
 
Not wishing to kiss-ass, but I reckon they all look pretty damn good!
 
Seriously, very nice photos! I think your lens is fine to be honest. But do that brick wall test just to ease your mind! :)
 
i can't wait to get this lens haha, might see if i can try one out first if i take my body to the store though :lol:
 
Not up to your standard yet Stylgeo! Your pics are awesome![/QUOTE]


i dissagree i think you are up to that standard
your images are great your lens is fine
 
dore187 said:
Not up to your standard yet Stylgeo! Your pics are awesome!
Click to expand...


i dissagree i think you are up to that standard
your images are great your lens is fine[/QUOTE]

:agree::plusone:
Those are photos anybody would be very proud of! TBH, the first one is still my favourite, and quite usable. You don't have to pixel peek to appreciate a photo! Great composition and dynamics, and beautiful PP as well!
 
Dore187 and Stylgeo Thank you very much for those comments you just made my day! glad you like them.
 
The images are great, but if I'm remembering correctly they aren't the best to show any lens problems. I thought (and I could be wrong) the way would be to take a photo of something like a brick wall that is the directly opposite to the camera (use tripod, release, mirror lock up etc) and that should show up any softness toward the edges of the lens.
 
Yeap, looks fine to me mate! :thumbs:
 
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