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If there is a hum with IBIS that is distracting why not

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billbourd

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If there is a nuisance hum with IBIS on the E-M5 why can't the IBIS gyros be programmed to depower when IBIS is turned off. From some of the posts I have read this can't be done because the sensor then would float free? Why then can't it be programmed to go into the same state as when shooting video when the "hum" is much less noticeable? Does this then mean when shooting video the IBIS is less effective as it is quieter?

I really wish Olympus would end all of this by explaining why there is a hum and what if anything can be done about it. We then can decide to cancel our preorder or not. I for one am looking forward to getting my E-M5 and feel confident Olympus will correct any issues with a new software version if needed.

This reminds me of when I was waiting to get my GH1 and there was an issue with the loosening of the neck strap lugs which Panasonic finally resolved.

Billbourd
 
It may not be the gyros that are humming. In fact, gyros generally need to run so smooth that you can't hear nor feel them.

What may be humming are the electromagnets that position the sensor, and the whatever electrical modulation (PWM?) that is necessary to take the sensor to the needed location.
 
Liveview was not perfect when the E-330 came out, but we survived, now look around!

I lost count of how many problems where solved by that solution. Wait for the EM-7 for a quiter IBIS if you can handle the hum. Like I said before it will eventualy sing :)
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Bluephotons
Ah, but I was so much older then, I'm younger than that now. Bob Dylan
 
billbourd said:
I really wish Olympus would end all of this by explaining why there is a hum and what if anything can be done about it.
Click to expand...
I really wish bored & clueless people would just stop complaining about something that's present in every IS lens system but almost indetectable and realize there is nothing to do about it and be done with whining about nothing in long, stupid posts, spreading inane nonsense...
 
IS makes a slight, almost inaudible noise. The way the OM-D is designed means the IBIS is always on. Thus there will always be a slight, almost inaudible noise.

Nobody noticed or commented until one poster, reasonably enough, wanted to check that the noise was normal. It is. Case closed. It isn't going to go away and it is not a problem.
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http://www.youtube.com/watch?v=U4jViGmfhLw

Notice that, when the E-M5 is turned OFF the sensor literally falls down into the body somewhat. The sensor is not even horizontal when in the OFF state.

When you turn the camera ON the magnets turn on and FLOAT the sensor such that it is positioned in the center of the imaging circle. Clearly, certain mechanisms in the IBIS system must be enabled ALL THE TIME to position the sensor in the center of the imaging circle - even if you have disabled image stabilization.

Put another way:

image stabilization ON = float the sensor ( turn on magnets ) + shake the sensor to counteract camera movement ( engage gyros to modulate magnets )

image stabilization OFF = float the sensor ( turn on magnets )
 
Nobody has ever mentioned that the gh2 makes a constant humming/whistling noise too whenever it's switched on.

It seems to be something to do with the autofocus (14-140), it's not something I notice much, only when listening for it, I just assumed it was normal, actually I'm sure it is.

Perhaps we are all listening/looking for faults when we should be out taking photos...
 
That is interesting. I've heard people saying that humming noises are generated by certain stabilized lenses as well. I agree that this is really a non-issue.

In fact, I posted the above video (and this one below) because I find the 5-axis stabilization to be a marvelous feat of engineering in action (noise or no noise):

http://www.youtube.com/watch?v=OiSw5ljeoT0

Seeing the sensor moving like that is not unlike seeing a human eye moving. It is actually quite organic and beautiful.
 
Rumor has it that the problem is in the separate EVF stabilizing system. If true, then this is not something that is present in every IS system.

Personally, I doubt it will be a problem for all but a very few number of people.
 
Indeed - my G3 w/ kit lens makes a constant soft "whirring" regardless of OIS being on or off.

I noticed it the first day I had the camera and never again.
 
Only thing that would concern me is possible power drain. If so, I'll just carry extra batteries. Would like to be sure about that ahead of time, however.
 
Light Fantastic said:
http://www.youtube.com/watch?v=U4jViGmfhLw

Notice that, when the E-M5 is turned OFF the sensor literally falls down into the body somewhat. The sensor is not even horizontal when in the OFF state.

When you turn the camera ON the magnets turn on and FLOAT the sensor such that it is positioned in the center of the imaging circle. Clearly, certain mechanisms in the IBIS system must be enabled ALL THE TIME to position the sensor in the center of the imaging circle - even if you have disabled image stabilization.

Put another way:

image stabilization ON = float the sensor ( turn on magnets ) + shake the sensor to counteract camera movement ( engage gyros to modulate magnets )

image stabilization OFF = float the sensor ( turn on magnets )
Click to expand...
Thanks for the explanation, it now makes sense. Is there an explanation you know of why the "hum" is reduced in video mode?

Thanks again for your input. BTW I received part 1 of my E-M5 order from Samys, the FL-300R wireless flash. Anxiously awaiting the trigger device.
Billbourd
 
....:)....
 
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