Does the sign in this snap look sharp to you?

dougietee

dougietee

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Doug
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HH D7000 with Sigma 10-20 @ 10mm 1/200sec f16

Focus points are on the underground sign.

Was just having a play with my new wide lens yesterday and I don't seem to be getting particularly sharp images. I'm wondering what I might be doing wrong.
 
Looks OK to me, whether the original full size is up to par is another matter, it could of course be your technique, but with an ultra wide lens and a shutter speed of 1/200 it would be difficult to get a bad shot :)
 
Did you use manual focus or auto focus and are you sure the focus point was on the underground sign? It looks like the sign in the upper right is more in focus.

Did you use a tripod or go handheld?

Also, 10mm @ f/16 is a very small aperture (0.625 mm). I suspect diffraction is coming into play here. If you try the same shot again at f/6.3 or f/7.1, using a tripod with manual focus I suspect you will get much sharper results.
 
When i zoom in the underground sign looks OOF but the one on the building beside it looks sharper to me.:):thumbs:
 
WinstonSmith said:
Did you use manual focus or auto focus and are you sure the focus point was on the underground sign? It looks like the sign in the upper right is more in focus.

Did you use a tripod or go handheld?

Also, 10mm @ f/16 is a very small aperture (0.625 mm). I suspect diffraction is coming into play here. If you try the same shot again at f/6.3 or f/7.1, using a tripod with manual focus I suspect you will get much sharper results.
Click to expand...

Auto focus and handheld, I've made the mistake of thinking that to make everything sharp I want a smaller aperture haven't I?
 
^ Yep, sounds like it.

You possibly read that a lens wasn't at it's sharpest wide open and compensated. This is only the case when a lens is very wide (f/4 in your case I believe).

Just back it off a little bit and you should be ok.
 
dougietee said:
Auto focus and handheld, I've made the mistake of thinking that to make everything sharp I want a smaller aperture haven't I?
Click to expand...

What auto focus mode are you using? When testing out new gear, try using Spot AF or single point AF rather than any of the auto zone modes, so that you're sure the focus is exactly where you want it to be.

Another benefit of using a wider aperture in this case is that you will be able to get more light in, hence use a faster shutter speed and thus further mitigate the effects of an unsteady hand.
 
WinstonSmith said:
What auto focus mode are you using? When testing out new gear, try using Spot AF or single point AF rather than any of the auto zone modes, so that you're sure the focus is exactly where you want it to be.

Another benefit of using a wider aperture in this case is that you will be able to get more light in, hence use a faster shutter speed and thus further mitigate the effects of an unsteady hand.
Click to expand...

It was on AF-A auto will try a spot mode next time. Thanks.
 
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