Anyone Else Heard About This?

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DougC

DougC

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From the owners manual of the new 400mm Z f2.8 TC:

Warning
Do not use this product if you have a pacemaker or use other medical devices. The magnets in this product could cause medical devices to malfunction.

I have neither a pacemaker nor this lens but is the danger real?
 
Interesting. According to this FDA article some medical devices have a magnet mode that suspends operation while a magnet is near, so you can get an MRI and such. Says it goes back to normal when the magnet is no longer near.

www.fda.gov

Magnets in Cell Phones, Smart Watches May Affect Implanted Devices

Consumer electronic devices with high magnetic fields such as cell phones and smart watches may affect the normal operation of some implantable medical devices.
www.fda.gov www.fda.gov
 
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bleirer said:
Interesting. According to this FDA article some medical devices have a magnet mode that suspends operation while a magnet is near, so you can get an MRI and such. Says it goes back to normal when the magnet is no longer near.

www.fda.gov

Magnets in Cell Phones, Smart Watches May Affect Implanted Devices

Consumer electronic devices with high magnetic fields such as cell phones and smart watches may affect the normal operation of some implantable medical devices.
www.fda.gov www.fda.gov
Click to expand...
When photographing a bird is life and you'd rather put your life support on lower priority than miss the shot. Nice :)
 
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Don't know about that lens, but I do know about my implanted defibrillator/pacemaker -- a magnet held near the device (it's in front of my left shoulder just below the collarbone as are most such devices) will turn it off for as long as the magnet's there. The device will also record the presence of the magnet and that will show up when the device is checked/tested. So, a camera and a lens with fairly powerful magnets hung on a neck strap might be near enough to have an impact on a defibrillator/pacemaker. Check with a cardiologist who's familiar with the device in question.
 
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DougC said:
From the owners manual of the new 400mm Z f2.8 TC:

Warning
Do not use this product if you have a pacemaker or use other medical devices. The magnets in this product could cause medical devices to malfunction.

I have neither a pacemaker nor this lens but is the danger real?
Click to expand...
Considering the size of the voice coil - my stereo speakers are many times larger.
Even the speakers on my PC have bigger voice coils.
And dont forget that the current flavour of the month the 100-400mm Z lens has voice coil AF...🦘
 
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arbitrage said:
Yeah...buy a $14K lens just to go see if you can even safely use it....is that really feasible for anyone?
Click to expand...
- On the positive side, if it is a problem, the hospital bill would likely make the lens seem inexpensive! :oops:

Not A Speck Of Cereal said:
People with pacemakers: please don't take medical advice from photo forums where people want you to test the magnetic properties of your lens by seeing if your car keys stick to it.
Click to expand...
- I get all of my medical advice off of the internet! Doesn't everyone? :p Actually, I once heard a doctor admit that they sometimes refer to medical sites online for backup and case resolution reinforcement; they also use books. It's similar to getting a second, or third, medical opinion without a visit to another office or facility.
 
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