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Dust Problems (Poor Design)?

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Well, I stopped reading halfway through, but I think you must be doing something wrong too. I have changed out my lenses many times now, and it is my first such camera ever. Between my kit, 3FDn lenses, and Zeiss, I swap at least 3 or 4 times a day.

I only once have gotten dust that affected my image, and that was because I forgot to turn the cam off, and left it sitting sensor side up for about 1 minute while working on a lens. It crippled my cam for 2 days, until I got the following. Dont cheap out, it has noticeable benefits over the others, and the large is on sale for 9 bucks. One round of puffing and the sensor was spotless to the eye and at macro f16, sky, etc.

http://www.amazon.com/Giottos-AA1900-Rocket-Blaster-Large/dp/B00017LSPI/ref=sr_1_2?s=electronics&ie=UTF8&qid=1330231183&sr=1-2





Anyway, obviously we have to conclude you can take steps to reduce this issue, or others would certainly be complaining. If you bought it at Amazon, contact them and ask for a replacement, they will do it if it is within a reasonable time, in my experience.
 
I am using NEX for about 2 years now and DSLR for 6 years. I was scared a lot of dust when I started with my first DSLR. Those were much worse then NEX or modern DSLRs. Now all sensors have some dust repelling system that basically doe snot get much dust in the first place, makes sure dust falls off and does not stick, there are some vibrations that shake it off now and then.

Anyway my KM 5D was a dust magnet by design! So I read a lot. The best advice I found and I use to this day is how to change lenses. I learned this and practice it all the time and believe it for not for 6 years I had only had to air blow my sensors 3 or 4 times total!!! Not every camera I used ever needed this!

So here is the procedure in case you want to use it:

1. Find some flat surface - if possible not on the ground, if possible with not much wind around.

2. put the lens you are about to use with the front lens down i.e. bayonet facing up
3. loosen the rear cap of the lens
4. hold your camera lens facing down
5. push the lens release button on camera and un-screw the lens.

6. Gently put the old lens and the camera on the surface, such that the lens stays stable

7. quickly swap the camera and the rear lens cap between lenses. Pay special attention to not swing camera around when without lens attached.

This is it. simple and effective.

Few more ideas: When in the desert or other very dusty place use zoom lenses instead of changing lenses all the time. Sometimes you need to which is ok. I use 18-250 on my DSLR for day time shooting and 17-50/2.8 for night time. On NEX the 18-200 can fullfill both roles

I have been using NEX-5 in desert settings and did change lenses quite a few time. No dust. So you just need more practice. It is ok to be frustrated when using more professional equipment. Point and shoots are consumer grade devices that require no skill and produce mediocre results at best. NEX-7 is advanced amateur class it does require some learning, care etc. but does miracles when you know how to use it.
 
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