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Author Topic: Canon EF 40mm f/2.8 STM Product Advisory  (Read 5371 times)

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Canon EF 40mm f/2.8 STM Product Advisory
« on: August 08, 2012, 11:58:17 AM »
To Users of the EF40mm f/2.8 STM Interchangeable Lens for Canon Digital SLR Cameras
Thank you for using Canon products.

It has been confirmed that the autofocusing function of the EF40mm f/2.8 STM lens, which was released in June 2012, may not operate correctly.

The details of this phenomenon are described below.

Affected Product
EF40mm f/2.8 STM

Phenomenon
If pressure is applied to the lens barrel while the lens is mounted to the camera (pressure can be applied even while attaching the lens cap or while carrying the camera with the lens attached in a bag), the autofocusing function of the lens may stop working.

*This phenomenon does not occur during normal shooting.

*This phenomenon does not result in a malfunction of the lens.

Workaround
When the above phenomenon occurs, detach and reattach the lens, or remove and reinsert the camera battery to restore the operations.

Market Support
The firmware to address this phenomenon will be available for download in late August, 2012.

Once this firmware is ready, we will make an announcement on our Web site.

cr

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Canon EF 40mm f/2.8 STM Product Advisory
« on: August 08, 2012, 11:58:17 AM »

preppyak

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #1 on: August 08, 2012, 12:05:58 PM »
So...putting your lens cap on might cause it to not be able to AF without taking the lens off and on?

Yeah, that's something that shouldn't have made it past QC testing.

trulandphoto

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #2 on: August 08, 2012, 12:18:46 PM »
So...putting your lens cap on might cause it to not be able to AF without taking the lens off and on?

Yeah, that's something that shouldn't have made it past QC testing.

True. It's happened to me putting the lens cap back on. It's not hard to get in the practice of retracting the lens first, though. And you don't have to remove the lens just rotate it a bit and re lock it.

I stil love the lens.

Jarques

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #3 on: August 08, 2012, 12:37:39 PM »
Yeah I've had this happen to me multiple times, I usually detach and reattach the lens to fix it. Very annoying.

Still a fantastic lens though.

Dylan777

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #4 on: August 08, 2012, 12:54:02 PM »

This is why I patiencly wait for GOOD copy of new 24-70 V2.
Body: 1DX -- 5D III
Zoom: 24-70L II -- 70-200L f2.8 IS II
Prime: 40mm -- 85L II -- 135L -- 400L f2.8 IS II

lol

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #5 on: August 08, 2012, 01:03:27 PM »
At least it is a firmware download to fix it. Wasn't the firmware update for the new great whites a return to factory job?
Canon 1D, 300D IR, 450D full spectrum, 600D, 5D2, 7D, EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 70-300L, 100-400L
EF-S 15-85, TS-E 24, MP-E 65, Zeiss 50/2 macro, Sigma 150 macro, 120-300/2.8 OS, Samyang 8mm fisheye

neuroanatomist

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #6 on: August 08, 2012, 01:06:57 PM »
At least it is a firmware download to fix it. Wasn't the firmware update for the new great whites a return to factory job?

Yes, but in this case it might be camera firmware updates, not lens firmware. We'll see...
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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #6 on: August 08, 2012, 01:06:57 PM »

lol

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #7 on: August 08, 2012, 01:15:31 PM »
Good point, but at the risk of getting too far ahead of ourselves, would they update old bodies too if that were the case?
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Viggo

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #8 on: August 08, 2012, 01:26:43 PM »
I think this is ridicolous..... I really do..  :o
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peederj

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #9 on: August 08, 2012, 01:56:18 PM »
At this price I would think Canon would move heaven and earth to make it a field-upgrade via the body firmware. Factory re-work and reshipment of the thousands of those $199 lenses out there now would nuke their profits.

Of course that means new firmware for all the EF bodies, no? Which means the potential of magic lantern as well I'd think. (Evil cackle)  ;D

I do like the lens although I still hate focus-by-wire.

Etienne

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #10 on: August 09, 2012, 08:45:44 AM »
When was the last time Canon put out a glitch-free product?

Zlatko

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #11 on: August 09, 2012, 09:28:04 AM »
I stil love the lens.
Me too!  It's one of my favorite lenses.

Phenix205

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #12 on: August 09, 2012, 09:34:15 AM »
When was the last time Canon put out a glitch-free product?
When was the last time anyone else put out a glitch-free product?
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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #12 on: August 09, 2012, 09:34:15 AM »

c.d.embrey

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #13 on: August 09, 2012, 10:58:37 AM »
Maybe it should be called the Shorty McShorty, 'cause it's electronics easily short-out. ;)  ;)  ;)

tron

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #14 on: August 09, 2012, 11:58:26 AM »
At this price I would think Canon would move heaven and earth to make it a field-upgrade via the body firmware. Factory re-work and reshipment of the thousands of those $199 lenses out there now would nuke their profits.

Of course that means new firmware for all the EF bodies, no? Which means the potential of magic lantern as well I'd think. (Evil cackle)  ;D

I do like the lens although I still hate focus-by-wire.
I am pretty sure they would update ML too to cater for the new firmware.
Although I never understood why people are so crazy about the shorty 40 ... Canon DSLRs are big even with a small lens...

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Re: Canon EF 40mm f/2.8 STM Product Advisory
« Reply #14 on: August 09, 2012, 11:58:26 AM »