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Scratched lens
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Aug 4, 2022 13:36:09   #
Urnst Loc: Brownsville, Texas
 
How badly scratched does a lens have to be to affect its performance?

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Aug 4, 2022 13:51:38   #
ken_stern Loc: Yorba Linda, Ca
 
If you can see it in an image --
Now
That's bad enough for me

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Aug 4, 2022 14:05:18   #
Longshadow Loc: Audubon, PA, United States
 
ken_stern wrote:
If you can see it in an image --
Now
That's bad enough for me



For some, knowing that the scratch exists is bad enough, even if it can't be seen in an image.

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Aug 4, 2022 14:09:25   #
ken_stern Loc: Yorba Linda, Ca
 
There is a "dent" on one of the Webbs mirrors
Time to bring it home ---

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Aug 4, 2022 14:10:07   #
therwol Loc: USA
 
Urnst wrote:
How badly scratched does a lens have to be to affect its performance?


A small scratch on the front element won't affect much. A small scratch on the rear element can be a disaster. You really just have to look at your pictures and decide if performance has been compromised.

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Aug 4, 2022 14:10:23   #
Mac Loc: Hernando County Florida
 
Urnst wrote:
How badly scratched does a lens have to be to affect its performance?


A good argument for a protective filter. A filter is less expensive to replace than a lens.

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Aug 4, 2022 14:25:46   #
Longshadow Loc: Audubon, PA, United States
 
Mac wrote:
A good argument for a protective filter. A filter is less expensive to replace than a lens.

That's why I use them.
They can always be removed as required for other filters.

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Aug 4, 2022 14:30:03   #
tradio Loc: Oxford, Ohio
 
Longshadow wrote:


For some, knowing that the scratch exists is bad enough, even if it can't be seen in an image.


That's me.

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Aug 4, 2022 14:37:50   #
Urnst Loc: Brownsville, Texas
 
Thanks for your replies. I was considering buying a lens with a scratch on the rear element. I think I will pass on it.

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Aug 4, 2022 20:30:43   #
Just Shoot Me Loc: Ithaca, NY
 
Mac wrote:
A good argument for a protective filter. A filter is less expensive to replace than a lens.


Here comes 9 pages!
Don't blame me I use them too.

Ron

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Aug 4, 2022 20:40:18   #
CHG_CANON Loc: the Windy City
 
It lowers the resale value. That hurts enough, even if you can't see the issue in the images.

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Aug 4, 2022 23:12:52   #
TriX Loc: Raleigh, NC
 
Just Shoot Me wrote:
Here comes 9 pages!
Don't blame me I use them too.

Ron


At least 9. Me too (but it wouldn’t have prevented a scratch on the back lens)

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Aug 5, 2022 00:29:58   #
Orphoto Loc: Oregon
 
A scratch in the rear element is far more significant than on the front. Pass on it.

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Aug 5, 2022 00:34:07   #
rmorrison1116 Loc: Near Valley Forge, Pennsylvania
 
Urnst wrote:
How badly scratched does a lens have to be to affect its performance?


I bought a used Canon EF 100-400L II lens for $600 because it had a chipped front element. Other than that the lens was in excellent condition. After shooting dozens of test shots with the chipped lens, I concluded the chip had no ill effect on the images, none.

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Aug 5, 2022 07:00:13   #
billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
 
Urnst wrote:
How badly scratched does a lens have to be to affect its performance?


If it effects the final image, it is then too badly scratched. Personally, I do not own nor will I buy scratched lenses.

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