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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 26 Sep 2010 (Sunday) 16:24
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Lens correction for EOS 70-300 seems off

 
Kent ­ Clark
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Sep 26, 2010 16:24 |  #1

I just got LR3 and have tried using the lens correction. The Adobe correction for the 70-300 introduces a white vignette when I apply it. Apparently the lens is supposed to produce a vignette and the definition is correcting that.

But none of my photos show any kind of vignette. I've had to manually lower the vignette slider all the way to the left to eliminate a white halo on photos corrected with this definition.

I'm wondering if anyone else out there with this lens has tried the correction and if they see the same thing I do.




  
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FlyingPhotog
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Sep 26, 2010 16:29 |  #2

The corrections are "on average" so a little customizing isn't out of the realm of possibility. It may not even need to be used in all instances. ;)


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Kent ­ Clark
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Sep 26, 2010 16:32 |  #3

Jay, I wouldn't call what I had to do a little customizing. Applying the correction makes a very white halo around the picture and, like I said, I had to slide the vignette slider all the way to the left to eliminate it.




  
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FlyingPhotog
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Sep 26, 2010 16:41 |  #4

You sure you didn't have the other vignette tool turned up as well?


Jay
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pol024
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Sep 26, 2010 17:30 |  #5

Do you have a crop body? 70-300 is an EF lens, so it should more than cover a 1.6 sensor. Maybe your tool is assuming FF?




  
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Kent ­ Clark
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Sep 26, 2010 18:06 |  #6

Yes, it's a 30D. I've played around with it a little more and found out that photos taken zoomed out at 150mm and higher show the vignette after correcting while photos taken at 70-100mm don't show it. But at neither focal length do the uncorrected photos show any dark vignetting.




  
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theextremist04
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Sep 26, 2010 18:45 |  #7

I would say polo has the right idea, the 70-300 probably has vignetting on full frame and so it's trying to correct for that, which is overcorrecting for the slighter vignetting on a crop body.


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FlyingPhotog
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Sep 26, 2010 18:47 |  #8

What body is the OP shooting with and does it have peripheral illumination and is that already turned on?


Jay
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Kent ­ Clark
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Sep 26, 2010 21:29 |  #9

Jay, it's a 30D, no peripheral illumination. It sounds like the problem is related to crop body on a non EFS lens. Maybe I'll create my own profile.




  
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Lens correction for EOS 70-300 seems off
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