Canon EF 100 400 IS L first impressions

I received my Canon EF 100-400 IS L f/4.5 f/5.6 two days ago, it is my 2nd L series lens after my beloved Canon EF 24-70 L f/2.8. Unfortunately I didn’t have the time to extensively test it yet, I will hopefully have a better chance to test drive it tomorrow in that rugby match I’m shooting. However here are my first impressions.
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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
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Camera precaution AFTER shooting in cold weather

Winter is nearly here, temperature are on free fall many of us enjoy shooting outdoors in these cold conditions. Some likes to push the limits even further by shooting in extreme weather conditions like sub-zero temperatures.
Here is a very simple, yet effective tip, to protect your camera after you finish shooting in cold weatherI am not taking into consideration any prevention while shooting
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How to calculate very long exposures

We are all so used to the fact that our camera is doing all the thinking for us, focus, exposure time, aperture etc…, that most of us will simply set the camera to the automatic modeP mode on my Canon EOS 30D, or worse use of the Program modes or those among us, me for example, who strictly use the Av, TV, and M modes, even if we decide about the shutter speed, aperture and/or ISO sensitivity, we greatly rely on the camera’s light meter to get the other variable.
But what about situations where the exposure time is beyond the capability of our camera like, for instance, very long exposure times that are greater than 30seconds?
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How to clean your camera sensor

Dust sensor, or dust bunnies, is, for most photographers, the most feared aspect of digital photography. Everyone hates to see those dust spots on their images.
Luckily cleaning the sensor is not hard if you just know what you are doing.
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