cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Dirty lens experiment

kvbarkley
VIP

How progressively worse dirt and damage affects image quality:

http://kurtmunger.com/dirty_lens_articleid35.html

 

5 REPLIES 5

BurnUnit
Whiz

Thanks for that. I've always suspected as much. I guess I won't even bother knocking a bit of crud or a smudge off my lenses with a shirt tale anymore. Smiley Wink

Well ... yeah. But it's pretty obvious that the lens being destroyed was old. Very few modern lenses turn while they're being focused.

 

The bottom line, which I think we all knew, is that you can get away with a dirty lens if it isn't too dirty. (I was once photographing the meet 'n greet session after a lecture and accidentally dangled my Sigma 50-150mm f/2.8 into a bowl of sour cream dip. And didn't notice it until the shoot was almost over. But my pictures came out OK.) But a clean lens is still better.

 

It's also true that cleaning a lens can do more harm than good unless you're careful. The best idea is to keep the lens from getting dirty in the first place. That's what lens caps are for.

Bob
Philadelphia, Pennsylvania USA

I have heard of putting vaseline on a lens, but sour cream is a new one!

 

8^)


@RobertTheFat wrote:

..(I was once photographing the meet 'n greet session after a lecture and accidentally dangled my Sigma 50-150mm f/2.8 into a bowl of sour cream dip. And didn't notice it until the shoot was almost over. But my pictures came out OK.)


LOL! Thank goodness it wasn't guacamole... Smiley Frustrated

:...dangled my Sigma 50-150mm f/2.8 into a bowl of sour cream dip"

 

As long as you didn't double dip!  Smiley Very Happy

EB
EOS 1DX and 1D Mk IV and several lenses!
Announcements
01/18/2023: New firmware version 1.1.1 is available for EOS R6 Mark II
01/09/2023: Help ensure your autofocus is properly aligned with a Canon Precision Alignment
01/03/2023: Welcome to CES 2023!
12/08/2022: New firmware version 1.0.5.1 is available for EOS C70
12/07/2022: New firmware version 1.7.0 is available for EOS R5
12/07/2022: New firmware version 1.7.0 is available for EOS R6
11/22/2022: New firmware available for EOS R3, EOS R7 and EOS R10
11/16/2022: We're thrilled to be ranked among the Best Employers for Veterans in 2022 by Forbes.
08/31/2022: New firmware version 1.1.1 is available for RF 70-200mm L IS USM
08/09/2022: New firmware version 1.2.0 is available for CR-N 300
08/09/2022: New firmware version 1.2.0 is available for CR-N 500
07/14/2022: New firmware version 1.0.1 is available for CR-X300
06/10/2022: Service Notice:UPDATE: Canon Inkjet Printer continuous reboot loop or powering down
06/07/2022: New firmware version 1.3.2 is available for PowerShot G7 X Mark III
05/31/2022: Did someone SAY Badges?
05/26/2022: New firmware version 1.0.5.1 is available for EOS-C500 Mark II
05/26/2022: New firmware version 1.0.3.1 is available for EOS-C300 Mark III
05/10/2022: Keep your Canon gear in optimal condition with a Canon Maintenance Service
05/05/2022: We are excited to announce that we have refreshed the ranking scale within the community!
04/26/2022: New firmware version 1.0.1.1 is available for EOS R5 C
03/23/2022: New firmware version 1.0.3.1 is available for EOS-C70
02/09/2022: Share Your Photos is back!
02/07/2022: New firmware version 1.6.1 is available for EOS-1DX Mark III
01/19/2022: READY FOR ANYTHING EOS-R5 C
01/13/2022: Community Update. We will be retiring the legacy profile avatars on 01/20/2022. Click this link to read more.