I hate to do this but you asked. NEX owners (some of whom have both NEX and u 4/3) have a lot of problems, IQ, design and quality control vis a vis u 4/3 camera owners. These quotes are all from the NEX forum. Later quotes are attributed because I was accused of making them up! Also, there is far more but I am limited to 6000 characters?
ZoranT (7/28/2010) says:
strange event one day: the camera was switched off, but I noticed that it got abnormally hot; I took out the battery and let it cool down, then inserted it back again; now the display shows a crossed out orange battery sign, the camera works though (I did not try for too long, though); I also noticed tiny brown spots where the battery connects to the camera (inside the slot) … What happened? Some closed circuit? Battery fried? Something in the camera? There was no water or anything abnormal involved, I should add. The camera was switched off (not standby), but still got hot.
Peter S said this (7/29/2010) regarding cronic overexposure:
I've had the NEX3 for a week or two and already noticed the bright condition overexposure (it doesn't even need to be sunny, overcast still caused it). But, what I found disconcerting is, to my eyes, it didn't look overexposed when reviewed on the camera's LCD and neither did the review histogram suggest overexposure. So, I shot a whole days worth of slightly overexposed pics without realising. Perhaps if the LCD is set to manual brightness it could be made to look more representative? Now I'm aware of the issue I can dial in the required -0.3 or -0.7 compensation. As long as I remember to remove it again for indoor shots, which seem perfectly exposed without compensation. Grrr..! Come on, Sony, it's not rocket science.
He also said that in comparison to the E-pl1:
No, my monitor isn't calibrated. But, subjectively, a lot of the NEX outdoor pics seem overly light - the mid-tones (foliage, grass, brick walls etc) seem lighter than they should be, giving the whole picture an overexposed look. I'm lucky enough to be able to compare the NEX with an EP-L1, a Pentax Kx, and a Sigma DP-1, all of which produce darker, more normal, looking images with the same monitor.
In response Keith C says:
Take it back immediately & ask for an exchange,do not contemplate a repair if it is offered. Others have had problems with batteries not working properly & Sony are probably aware of the problem .
Nboyer admitts on 7/29/2010 comments regarding E-pl1 kit lens cmpared to NEX:
But my NEX is only the 16mm kit so the PL-1 gets used for longer trips where I want more focal lengths and the, frankly, better Oly kit lens.
Markr041's NEX overheats while taking videos(7/29/2010):
I am often while shooting video having the camera stop because of overheating. This happens less than 25 seconds (sometimes) into a shot. The video stops, you get a message to cool off the camera, which is quite hot. It occurs in bright sunshine. Temperature in the air, about 86F. This is a serious problem - overheating. Anyone else have this problem? I have a black NEX 5... This is "a surprise" as I have taken videos under the same circumstances with: the Panasonic GH1, the Olympus Ep1, the JVC HM1, the Sony TX7 and never had this problem. There is nothing unusual about taking pictures and videos in the bright sun. I don't think 'designed for low-light' means 'won't work in bright light'!
On 7/3/2010 ricksAstro confirms overheating under ideal conditions:
I'm trying AVCHD now to see if I get better or worse performance. The good news was the battery was still over 50% after all of this, which pleased me. But the overheating issue concerns me. I mean, I gave it fairly ideal conditions (lowish room temp ambient, LCD folded out for heat dissipation) and it was throwing fits. Put it out in the heat of the day under the sun (esp with a black body) and the LCD against the body, I'm guessing you'll have issues. Of course, I don't think most people will be taking that long of clips under those conditions.
Nemo6666 has only had the camera two days (7/30/2010) and already has lots of problems:
I would like to start a new thread where people exchanges about issues and problems with their NEX cameras. As i received mine just 2 day ago and already have some things i don´t like, let me begin: long recharge time (Sony always wants you to buy another fast-recharger); fast battery drain over night (in my case between 7-10% in 12 hours); noisy shutter (might be construction dependent); 16mm lens unsharp; Other people complains about overheating.
Pascal04 (7/30/2010) doesn't like the noisy shutter on his NEX 5:
I will agree on the noisy shutter. It definitely should not be this noisy on a mirrorless camera.
Slokie said 7/25/2010 that his "wheel" is already starting to squeak:
well the wheel on my is already beginning to squeak
Torch 8/2/2010 has some ideas on how to keep NEX from overheating:
First I would turn down the display brightness to minimum and turn off any other power draining features I did not require. Even flipping out the display allows more airflow at body back. Can the tripod mounting plate be modified to dissipate heat using a thermal transfer skin? For now you set up a small fan like used for a computer case by the camera and see what happens. If that is not suitable I am sure you know how to get a battery operated fan and fasten it to a tripod. I am sure there can be creative methods to cool down a camera body as was done for computer video cards and processors. Somebody may come up with a custom cooling kit.