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Dirty lens experiment

kvbarkley
Esteemed Contributor

How progressively worse dirt and damage affects image quality:

http://kurtmunger.com/dirty_lens_articleid35.html

 

5 REPLIES 5

BurnUnit
Reputable Contributor

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

RobertTheFat
Honored Contributor

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

kvbarkley
Esteemed Contributor

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

 

8^)

BurnUnit
Reputable Contributor

@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!