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08-21-2017, 03:52 PM - 1 Like   #16
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QuoteOriginally posted by JinDesu Quote
One thing I think that should be brought up is that internal condensation due to moving from a warm to cold environment is to be expected, and is not a failing of the seals. Humidity levels inside and outside of the camera is the same regardless of seals or not - and temperature changes will condense the latent humidity.
This is an excellent point and one that I pondered addressing in more depth when writing. Water vapor will move with the concentration gradient regardless of the seals and under humid conditions, will be inside the camera as surely as it is in the air outside. The complicating factor is when the seals slow that movement when the outside air is dryer. I will update and clarify that section.


08-21-2017, 09:06 PM - 1 Like   #17
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Regarding condensation issue...condensation occurs only when your camera and lens surfaces are colder than dew point temperature. This can happen any number of ways, such as having your gear in an air conditioned hotel room and taking it outdoors into warm high humidity atmosphere, or taking your camera out of your cold car in the winter and bringing it into the warm and relatively humid indoors, or as mentioned/implied previously, taking the camera from a warm and humid situation and exposing it to sudden cold with the humid air trapped inside the camera and lens suddenly condensing on the walls. I felt I should add this clarification to the conversation, that being that taking to camera from a cold environment to a warm and humid environment can cause alarming condensation...this happened to me in New Orleans - seemed to take forever for the camera and lens to warm up enough to clear the glass of condensation.
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08-21-2017, 10:37 PM - 1 Like   #18

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Useful information here Steve, and well presented.

I would add a few things:

- the hot-shoe cover forms part of the camera WR. It can stop water and dust entry, so should be in place unless WR is not required;

- one should avoid vigorous zooming in/out with WR lenses during rain or dust events. Sealed zoom lenses (eg the 18-135 WR) act as air pumps, which means they can very easily suck material like water or dirt into the camera body. The drafts caused by such zoom activity may be easily felt at various points of the camera body, so the problem is clear. The air has to be vented somewhere, or otherwise those sealed zooms won't be able to zoom. Sealed primes (eg DA*300mm) don't have the same problem - just the zooms.
10-15-2017, 07:38 AM   #19
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QuoteOriginally posted by stevebrot Quote
Camera is demon possessed

Jokes aside, I did wind up with something resembling demonic possession a couple of years back when I covered a soccer game in heavy rain. Back then, I was using the DA 18-135mm, which is far from ideal for soccer, but that was because I had no other suitable lenses on hand. The camera's SR system wound up going haywire, causing the sensor to shake continuously. At one point, the camera refused to turn on, but I let it air out after the game and all was good.

I haven't had any water-related issues since.



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