just a dog OOF

[DannyLewis]

I have a canon t3i and a serious OOF problem the lens is the canon 100 400mm IS L series does this look out of focus to you?
View attachment 26007

 

[MLeeK]

Has that lens been taken apart?
What was the shutter speed here? At 300mm your shutter speed must be above 1/320 hand held IF you are very steady.

 

[Overread40]

It's very difficult to tell, but I can see why MLeek is asking about the lenses history, I can see what seems to be almost a circle of blurryness in the middle of the photo.

Best way to test this though is to take some test shots to help eliminate possible problems.

1) Put the setup on a tripod using lens's tripod collar.

2) Turn the IS off

3) Take a series of photos at a static subject directly facing the subject - a textured subject is best such as a brick wall (avoid plain subjects with a single colour).

4) Vary the aperture and ensure that each time a shot is taken that it is in focus - if you have a camera that supports live-view use the magnified view when composing the photo to ensure that the focus is directly on the subject (manual focus). Ideally you want to start wide open and go down to around f10 or so.

That should give us an idea of the lenses base performance across the whole frame edge to edge.
For a sharpness test keep the wall, only now set yourself up so that the camera is pointing at a 45 degree angle to the wall (side on is easier). Then again take the series of photos at varying apertures - this ensures that you'll have a line of sharpness always running through each photo (slight missfocusing won't affect this test).

Remember for these tripod test shots keep the IS off.

 

[fjrabon]

yeah, this looks like the lens is somehow messed up. The sides are sharp but the corners are soft. The center also seems washed out, lacking color and contrast.

 

[DannyLewis]

tthe lens is a few months and has never been apart or dropped. It was an ebay purchase. I will do the brick wall test tomorrow thnx alot folks. happy holidays

 

[DannyLewis]

I believe th eshutter speed was 320 but I was in a van with the side door open and in motion. a few mph

 

[DannyLewis]

How do I get exif data with my pictures? THe camera is a T3i

 

[fjrabon]

How do I get exif data with my pictures? THe camera is a T3i

what program do you use to edit your photos? Also, if you search for EXIF readers, there are plenty out there. Your EXIF data should be embedded into the file automatically, unless you have a program set up to strip it.

 

[EIngerson]

I believe th eshutter speed was 320 but I was in a van with the side door open and in motion. a few mph

Motion blur.

 

[480sparky75 74]

Shutter was 1/1,000.

 

[fjrabon]

yeah, youd need to be going like 60 mph to have motion blur at 1/1000. So, that is out.

 

[MLeeK]

This looks like a lens that has been taken apart and one element is not aligned properly.

 

[EIngerson]

I'm still saying motion blur. Probably had it on one shot instead of AI servo and locked in the focus and the car was still moving. Give us a fighting chance and take a picture while you're standing still. Trying to figure this photo out when you took it from a moving car is pointless.

 

[fjrabon]

I'm still saying motion blur. Probably had it on one shot instead of AI servo and locked in the focus and the car was still moving. Give us a fighting chance and take a picture while you're standing still. Trying to figure this photo out when you took it from a moving car is pointless.

Well, that's not motion blur, that's missing focus. As long as the subject is more than a few feet away, 1/1000 is sufficient to take pictures while driving down the interstate.

 

[Starskream666]

whys the quality so bad? and yea looks out of focus