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Old Sep 27, 2010, 3:46 PM   #11
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Well, it says Macro but the lens is not really a Macro lens. Yes: minimum focus distance is about 1.15' (0.35m), but thats not real Macro.
Your pick shows a couple of meters. Are you sure you don't have some kind of filter there? Can you show the Exif data?
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Old Sep 27, 2010, 3:57 PM   #12
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Ok I see. Thanks for clarifying that.

I have no filters attached.

I do not see the focusing distance in this exif from DPP. However, if I click on tune lens aberration it says focus is set to minimum focusing distance. I believe the stuff are in focus because of I am shooting at 15mm? I gets completely blurry at 85mm for example.

exif data:

Code:
File Name    IMG_0578.CR2
Camera Model    Canon EOS 50D
Firmware    Firmware Version 1.0.7
Shooting Date/Time    09/27/10 21:23:24
Owner's Name    
Shooting Mode    Aperture-Priority AE
Tv( Shutter Speed )    0.4
Av( Aperture Value )    22.0
Metering Mode    Evaluative Metering
Exposure Compensation    0
ISO Speed    3200
Auto ISO Speed    OFF
Lens    EF-S15-85mm f/3.5-5.6 IS USM
Focal Length    15.0mm
Image Size    4752x3168
Image Quality    RAW
Flash    Off
FE lock    OFF
White Balance Mode    Auto
AF Mode    Manual focusing
Picture Style    Standard
Sharpness    3
Contrast    0
Saturation    0
Color tone    0
Color Space    sRGB
Long exposure noise reduction    0:Off
High ISO speed noise reduction    3:Disable
Highlight tone priority    0:Disable
Auto Lighting Optimizer    3:Disable
Peripheral illumination correction    Disable
File Size    22288KB
Dust Delete Data    No
Drive Mode    Single shooting
Live View Shooting    OFF
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Old Sep 27, 2010, 4:09 PM   #13
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Quote:
Originally Posted by Ordo View Post
Well, it says Macro but the lens is not really a Macro lens.
Well, at a focal length of 15mm, a focusing distance of 1.15' (0.35m) isn't macro, but at 85mm it is.
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Old Sep 27, 2010, 4:09 PM   #14
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Yep. Seems a problem with the lens. Sorry. Check it with Canon service. I have the same lens and nothing of this happens.
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Old Sep 27, 2010, 4:12 PM   #15
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Quote:
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Well, at a focal length of 15mm, a focusing distance of 1.15' (0.35m) isn't macro, but at 85mm it is.
Truth. This is a 1" toy. Look the extreme DOF:



But the vignetting (almost a distortion) is happening at 15 mm.
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Old Sep 27, 2010, 4:12 PM   #16
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Did you try to take a picture at 15mm and f22? Thanks in advance!
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Old Sep 27, 2010, 4:20 PM   #17
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At apertures smaller than f/16, the Canon 15-85 starts to not look so good, and that's about the diffraction limit of the 50D anyway. If you use an aperture smaller that that on any lens connected to the 50D, you're going to get some odd things going on.

What's odd is that it only shows up in one corner. What happens if you put the hood or a filter on it?
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Old Sep 27, 2010, 4:29 PM   #18
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It shows up in all corners. Look at the latest picture I posted. It's just that it is most pronounced in the top right corner. And when I focused to nearest distance the problem got magnified, i.e. all corners were black to some extent.
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Old Sep 27, 2010, 5:27 PM   #19
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Change the lens.
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Old Sep 27, 2010, 7:16 PM   #20
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Quote:
Originally Posted by Shompis View Post
It shows up in all corners. Look at the latest picture I posted. It's just that it is most pronounced in the top right corner. And when I focused to nearest distance the problem got magnified, i.e. all corners were black to some extent.
Well, there's vignetting, and then there's vignetting. The vignetting that's occuring in the other three corners is your typical, everyday vignetting. The vignetting in the upper right corner is because something is in the way.
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