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Crazy going's on in the 14-24mm 2.8

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primeshooter

primeshooter

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Have a look at the image below. I think this if field curvature, but willing to be corrected over this! This is focused on the boy, as you can see he is sharp and infinity in the central portion behind him sharp too, but both edges are severely blurred. Hope it is visible, it's very noticeable on the 36mp image. It's odd as it doesn't happen all the time, seems to be aperture and distance related. I can focus on infinity now and get edge to edge sharpness, but if I have a subject close to camera that I focus on, even at f/8 I get central infinity sharp and side blur. Anyone else noticed this? Click the image, then 100% or loupe...



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I see this, though not seen this at all on mine. Get it checked out maybe?
 
primeshooter said:
Have a look at the image below. I think this if field curvature, but willing to be corrected over this! This is focused on the boy, as you can see he is sharp and infinity in the central portion behind him sharp too, but both edges are severely blurred. Hope it is visible, it's very noticeable on the 36mp image. It's odd as it doesn't happen all the time, seems to be aperture and distance related. I can focus on infinity now and get edge to edge sharpness, but if I have a subject close to camera that I focus on, even at f/8 I get central infinity sharp and side blur. Anyone else noticed this? Click the image, then 100% or loupe...



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Click to expand...
I think wide angle lenses are your nemesis. Or that D800 you have. This 14-24 might be going to cause you as much grief as the 1.4 primes did.

I think first thing you should do is shoot some more with subject in the middle as you've done here, maybe different backgrounds, and see what transpires.

--
A Canon G5 and a bit of Nikon gear.
The trouble with normal is it always gets worse - Bruce Cockburn
 
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T O Shooter said:
primeshooter said:
Have a look at the image below. I think this if field curvature, but willing to be corrected over this! This is focused on the boy, as you can see he is sharp and infinity in the central portion behind him sharp too, but both edges are severely blurred. Hope it is visible, it's very noticeable on the 36mp image. It's odd as it doesn't happen all the time, seems to be aperture and distance related. I can focus on infinity now and get edge to edge sharpness, but if I have a subject close to camera that I focus on, even at f/8 I get central infinity sharp and side blur. Anyone else noticed this? Click the image, then 100% or loupe...



--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
I think wide angle lenses are your nemesis. Or that D800 you have. This 14-24 might be going to cause you as much grief as the 1.4 primes did.

I think first thing you should do is shoot some more with subject in the middle as you've done here, maybe different backgrounds, and see what transpires.

--
A Canon G5 and a bit of Nikon gear.
The trouble with normal is it always gets worse - Bruce Cockburn
Click to expand...
Do you own this lens. Can you try it yourself, see what transpires? ;-)

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pcm81 said:
full frame camera. Center is sharper than edges. What else is new?

--
1. D800 is the first camera with resolution so high that it simply does not matter.
2. Most people who do not own/shoot d800 misunderstand it. Color depth and accuracy in addition to resolution is what makes d800 great. Resolution alone is over rated.
Click to expand...
Often true, but a generalisation in this instance.

Do you own/have you owned this lens? Think the OP would benefit from owners/previous owners' input; this lens is sharp centre to corner at most apertures/focal lengths...

Take a look at the corners of this hand-held shot I took, distortion notwithstanding:

British Museum, London @14mm f8
British Museum, London @14mm f8

Edit: the compression on DPR has made this a little softer all round.
 
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AutumnAura said:
pcm81 said:
full frame camera. Center is sharper than edges. What else is new?

--
1. D800 is the first camera with resolution so high that it simply does not matter.
2. Most people who do not own/shoot d800 misunderstand it. Color depth and accuracy in addition to resolution is what makes d800 great. Resolution alone is over rated.
Click to expand...
Often true, but a generalisation in this instance.

Do you own/have you owned this lens? Think the OP would benefit from owners/previous owners' input; this lens is sharp centre to corner at most apertures/focal lengths...

Take a look at the corners of this hand-held shot I took, distortion notwithstanding:

British Museum, London @14mm f8
British Museum, London @14mm f8

Edit: the compression on DPR has made this a little softer all round.
Click to expand...
Autumn, I have NO ISSUES with these types of shots, edge to edge sharpness basically at any aperture. Try it with a subject like I did, closer up.

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NEVER look at the image at 100%!

I think this has been discussed by some reviewers like Lloyd Chambers - apparently the 14-24 does have a focus shift (and field curvature) so for optimal focus with stopped down images you should focus using liveview at f/4.

With a 36MP image, if you are going to examine it at 100%, careful focusing is necessary.
 
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I have this lens which I use with my D800. Out of curiosity, how close is the child to the lens? And is the focus point on him?

Michael
 
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inasir1971 said:
NEVER look at the image at 100%!

I think this has been discussed by some reviewers like Lloyd Chambers - apparently the 14-24 does have a focus shift (and field curvature) so for optimal focus with stopped down images you should focus using liveview at f/4.

With a 36MP image, if you are going to examine it at 100%, careful focusing is necessary.
Click to expand...
I understand all this but your missing my point. Focusing on a subject to get them pin sharp, is it normal to then get infinity behind them sharp too but the sides out.
 
primeshooter said:
T O Shooter said:
primeshooter said:
Have a look at the image below. I think this if field curvature, but willing to be corrected over this! This is focused on the boy, as you can see he is sharp and infinity in the central portion behind him sharp too, but both edges are severely blurred. Hope it is visible, it's very noticeable on the 36mp image. It's odd as it doesn't happen all the time, seems to be aperture and distance related. I can focus on infinity now and get edge to edge sharpness, but if I have a subject close to camera that I focus on, even at f/8 I get central infinity sharp and side blur. Anyone else noticed this? Click the image, then 100% or loupe...



--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
I think wide angle lenses are your nemesis. Or that D800 you have. This 14-24 might be going to cause you as much grief as the 1.4 primes did.

I think first thing you should do is shoot some more with subject in the middle as you've done here, maybe different backgrounds, and see what transpires.

--
A Canon G5 and a bit of Nikon gear.
The trouble with normal is it always gets worse - Bruce Cockburn
Click to expand...
Do you own this lens. Can you try it yourself, see what transpires? ;-)

--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
I do own it. But it can be a bit of a novelty item, unless you have a specific purpose for it. You'll find that using it for portraits such as you've done here will quickly become a bit of a cliche. Is that you're only shot with it, because if it is, you're jumping the gun a bit. Last thing you need is another issue as annoying as the 1.4 prime one you had.

--
A Canon G5 and a bit of Nikon gear.
The trouble with normal is it always gets worse - Bruce Cockburn
 
T O Shooter said:
primeshooter said:
T O Shooter said:
primeshooter said:
Have a look at the image below. I think this if field curvature, but willing to be corrected over this! This is focused on the boy, as you can see he is sharp and infinity in the central portion behind him sharp too, but both edges are severely blurred. Hope it is visible, it's very noticeable on the 36mp image. It's odd as it doesn't happen all the time, seems to be aperture and distance related. I can focus on infinity now and get edge to edge sharpness, but if I have a subject close to camera that I focus on, even at f/8 I get central infinity sharp and side blur. Anyone else noticed this? Click the image, then 100% or loupe...



--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
I think wide angle lenses are your nemesis. Or that D800 you have. This 14-24 might be going to cause you as much grief as the 1.4 primes did.

I think first thing you should do is shoot some more with subject in the middle as you've done here, maybe different backgrounds, and see what transpires.

--
A Canon G5 and a bit of Nikon gear.
The trouble with normal is it always gets worse - Bruce Cockburn
Click to expand...
Do you own this lens. Can you try it yourself, see what transpires? ;-)

--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
I do own it. But it can be a bit of a novelty item, unless you have a specific purpose for it. You'll find that using it for portraits such as you've done here will quickly become a bit of a cliche. Is that you're only shot with it, because if it is, you're jumping the gun a bit. Last thing you need is another issue as annoying as the 1.4 prime one you had.

--
A Canon G5 and a bit of Nikon gear.
The trouble with normal is it always gets worse - Bruce Cockburn
Click to expand...
I don't find it novelty at all, I use it for landscape photography and stuff like this, don't find it cliche it's just another photograph. Remember everything is cliche in photography...And yes, seen it in a few shots. Only with a subject up front. Otherwise it's edge to edge sharpness.

--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
 
primeshooter said:
lickity split said:
Take a look here it might have something to do with it..

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http://www.flickr.com/photos/lickitysplit11111/
Click to expand...
You have not understood what I have said at all. Dof problems don't cover this if infinity centre is sharp, and the foreground subject, but the sides blurry equally.

--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
Your right ,I missed the part about the edges I was only thinking about the foreground. My bad. :-)

--
http://www.flickr.com/photos/lickitysplit11111/
 
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Just use any DOF caluculator and you will see at F6.3, 14mm, and subject about 6 feet away as you stated, will have about 3 feet in front focus and infinity back focus. Exaclty what you see in your photo. Edge issue is just the curvature of the lens on a full frame camera.





Bob P.
 
primeshooter said:
Have a look at the image below. I think this if field curvature, but willing to be corrected over this! This is focused on the boy, as you can see he is sharp and infinity in the central portion behind him sharp too, but both edges are severely blurred. Hope it is visible, it's very noticeable on the 36mp image. It's odd as it doesn't happen all the time, seems to be aperture and distance related. I can focus on infinity now and get edge to edge sharpness, but if I have a subject close to camera that I focus on, even at f/8 I get central infinity sharp and side blur. Anyone else noticed this? Click the image, then 100% or loupe...



--
facebook https://www.facebook.com/stevenrphotographs
google + https://plus.google.com/u/0/+StevenRobinsonPhotographer/
flickr http://www.flickr.com/photos/steverphotographer/
Click to expand...
This seems like standard field curvature. Not sure degree wise if it's normal for the 14-24 as I don't own it. Some of my Canon lenses have the same issue. Focal distance is generally significnatly shorter at the sides of the frame relative to the centre. When you focus to a close subject at say 3m away at the centre, the plane of sharp focus on the periphery will be much closer, like 1m or 2m. This often means it will be substantially below the hyperfocal distance. So f/8 is insufficient to bring everything is focus at the sides. Solution is to place your subjects to the side (so your focal distance is further out at the centre) or use a smaller aperture.
 
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