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 Post subject: the VR 18-200 breathing
PostPosted: Thu Oct 11, 2007 6:56 pm 
I've just noticed that, on my D40 coupled to a VR 18-200, and while moving the zoom from 18 to 200 mm and back, I can actually feel a gust of air going in and out of the camera body, through the viewfinder. I have to do this indoors and have my eye close to the viewfinder.

Wow... :shock:

I wonder if better weather sealed Nikon cameras also do this. The air has to go in and out somewhere.


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 Post subject:
PostPosted: Thu Oct 11, 2007 10:48 pm 
Haha I can notice it on my viewfinder as well. I have to move the lens in quicker than normal though to tell.


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 Post subject:
PostPosted: Fri Oct 12, 2007 12:55 am 
Uh
Wouldn't this means that the sensor would somehow be affected ? Getting a dose of puff air everytime you zoom in and out ?
Or is this the 'cleaning in progress' :lol:


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 Post subject:
PostPosted: Fri Oct 12, 2007 1:01 am 
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Joined: Fri Jun 01, 2007 12:40 am
Posts: 1330
Location: Scotland
To my mind this "feature" is the single biggest downside to zooms on dSLR bodies.

Zorro 8)

Also, if you think about it, the higher the build quality of the zoom (and hence the cost), the more pronounced the effect will be.

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Various lenses, SB800 & Manfrotto 190 with 460MG head


Last edited by zorro on Fri Oct 12, 2007 6:16 am, edited 1 time in total.

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 Post subject:
PostPosted: Fri Oct 12, 2007 1:18 am 
I always thought that the rear element on all but the older lenses were sealed?


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