Oct
30
See the Canon EF 100 400 L IS pump action
Recently I have built a FAQ for the Canon EF 100 400 L IS and in one of the answers I brought up the subject that the push/pull zoom of the Canon EF 100 400 L IS sucks the dust right into the sensor.
I got some emails from owners confirming that they have had no dust problem with that lens whatsoever which, by the way, was a big relief for me since I am expecting mine to arrive any day now.
Recently a fellow photographer did some scientific tests with his Canon EF 100 400 L and here are the results
Olli sealed with double rubber a plastic bag on his lens to check the amount of air going in and out at every pump
notice the volume difference of the bag.
The original thread can be found at Photography-on-the-net forum
- FAQ: Canon EF 100 400 L IS
- Top 10 reasons why you should NOT buy the Canon EOS 5D
- Canon EF 100 400 IS L first impressions
- Canon double fall rebates online calculator
- Dust-Aid warning for new Canon EOS owners
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2 comments on this post
Well, the air has to come from SOME place. Also as long as you put it on the body at 100mm it will only suck from the body, and blow THAT air in there again… If you put it openly without any lenscovers to 400 and then put it on the body: that’s rather stupid.
Have fun with the lens!
[Reply]
Antoine Khater Reply:
January 17th, 2009 at 12:05
@Steven, Thanks Steven for this tip I’ll keep it in mind
[Reply]