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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 04 Jul 2012 (Wednesday) 18:37
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AF problems with your 40mm Pancake? Please post your Serial Number.

 
LowriderS10
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Jul 04, 2012 18:37 |  #1

Hi guys and gals,

So...it looks like some of the Shorty40s are having an issue with the AF going to sleep and not waking up until the lens is unmounted/remounted. At this point, it appears that the majority of this happens when people push on the front element while the camera is on. There are no other reported issues with the AF. Someone asked that people post what bodies it's happening on, which is a good idea, but it seems to be a problem with the lens, regardless of the body.

I'm wondering if it's a big error on Canon's part or just a bad batch or two. So please post your Serial Number (if you're iffy about it, then post the last 3 digits as "XXX"), so we can track which lenses are affected and maybe, just maybe see a pattern evolving; thus helping those in the market check out the lens they're about to buy at the store and avoid it if it's in what appears to be a bad batch.

Please post your S/N below if you have had the AF issue and I will continually update this post to include your numbers, so people can just come to the first post and see what (if any) batch is popping up more often than others.

EDIT: I'm starting a list for examples with *NO* AF issues reported. However, if you put yours on a list, and THEN it has an issue, please let me know, so I can take it off the green list, and onto the red list.

Thanks,
Tamas

Have had the AF issue:

89010xxxxx on 7D
8921210514 on 1D4
90211xxxxx on 5D2
90211xxxxx on 5D2
90211xxxxx on 1D3
9021101xxx on 5D2
90211034xx on 60D
9021106xxx on 5D3
9021112742 on 60D
90212xxxxx on 7D
90212xxxxx on 5D3
902120xxxx on 5Dc
90212004xx on 60D
9021205032 on 60D
9021209xxx on a 5D2
90212100xx on 550D

No issues reported:

88010xxxxx on multiple
8901007234 on 5Dc
892100xxxx on 5D3
902111xxxx on 50D
9021112802 on 5D2
90212xxxxx on T3i
90212xxxxx on 5D2
90212006xx on 5D3
9021200611 on 5D3
9021201094 on 5D2
90212014xx on 7D


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mrkgoo
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Jul 05, 2012 04:32 |  #2

I was wanting to make this thread myself, but good job.

Canon 7D
40mm = 90212007xx

Has happened twice.




  
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ruhell
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Jul 05, 2012 04:58 |  #3

Canon 7D
40mm = 89010xxxxx


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aegid
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Jul 05, 2012 05:17 |  #4

Had it happen to me earlier today.

5D3
90212032xx

If it matters any, bought mine from Adorama.


5d3,17-40,24-105,24 1.4,85 1.4,70-200 2.8 is ii

  
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LowriderS10
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Jul 05, 2012 14:48 |  #5

Thanks very much guys! I have updated the original post. I know there are more lenses with this issue, please post up! :)


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kawi_200
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Jul 05, 2012 18:38 |  #6

I'll remember to post in here if I have a problem with my 40mm when I get it.


5D4 | 8-15L | 28-135mm f/3.5-5.6 IS | 24L II | 40mm pancake | 100L IS | 70-200mm f/2.8L IS mk2 | 400mm f/4 DO IS

  
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Invertalon
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Jul 05, 2012 18:39 |  #7

Interesting... This lens intrigues me just to have a somewhat faster, wider and lighter option. But maybe its good I holding out for now and wait for future shipments and hopefully sales!


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brambo76
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Jul 05, 2012 20:04 |  #8

it happened to me once. 5d2

90211XXXXX


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mrkgoo
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Jul 06, 2012 04:26 |  #9

I was going to suggest that it'd be worthwhile for passerbys that have similar serial number and camera combos to mention if they DON'T have any issue (yet).

I do wonder if it's just a quirk of the lens when certain conditions are met (such as moving the lens barrel while asleep).




  
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LowriderS10
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Jul 06, 2012 06:31 |  #10

dave_bass5 wrote in post #14677756 (external link)
Stupid question but is the serial number on the lens? I just went to post mine but cant find the number. i dont have the box with me but will post tonight.

Not a stupid question at all! While I don't have this lens, I believe for most Canons, the Serial Number is punched into the mount. If you take the lens off the body and look at the rear element, you should see the number on the mount. (By the way, great timing, I was about to message you asking you to post yours). :)


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dave_bass5
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Jul 06, 2012 06:35 |  #11

Good timing.
Thats where i looked but couldn't see anything. I was about to post yesterday but as i couldn't find it was going to wait until i got home to look at the box. I completely forgot.
Whatever, ll have it done by this evening (UK time).

so far its only happened the one, in a week.

EDIT: Found it. Its on the side, in dark grey :rolleyes:

9021205032
Canon 60D.


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Canon 5DMKIV | Canon EOS-M50 | Canon 24-70 f/2.8L MKII | 70-300L | 135L f/2.0 | EF-S 10-18 | 40 f/2.8 STM | 35mm f/2 IS | Canon S110 | Fuji F31FD | Canon 580EXII, 270EXII | Yongnuo YN-622C Triggers.

  
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LowriderS10
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Jul 06, 2012 06:49 |  #12

dave_bass5 wrote in post #14677771 (external link)
Good timing.
Thats where i looked but couldn't see anything. I was about to post yesterday but as i couldn't find it was going to wait until i got home to look at the box. I completely forgot.
Whatever, ll have it done by this evening (UK time).

so far its only happened the one, in a week.

EDIT: Found it. Its on the side, in dark grey :rolleyes:

90212xxxxx
Canon 60D.

Thanks, Dave! So far, thankfully it seems that it only happens to people once and then the lens continues behaving well for most people :)


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NikStar
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Jul 06, 2012 06:52 |  #13

mrkgoo wrote in post #14677550 (external link)
I was going to suggest that it'd be worthwhile for passerbys that have similar serial number and camera combos to mention if they DON'T have any issue (yet).

I do wonder if it's just a quirk of the lens when certain conditions are met (such as moving the lens barrel while asleep).

I've got a 90212xxxxx and I haven't had this happen, though, because of seeing this mentioned before I'd gotten mine, I've made sure to not push the lens in. I switch it to MF and turn it in using the focus ring. No issues.


Nik
Canon T3i | 18-55mm IS kit lens | 50mm f1.8 "nifty-fifty" | 40mm f2.8 "pancake" | 24mm f/2.8 "pancake" | Canon Speedlight 430ex II | Canon EOS M10 | Canon G9x

  
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DarthMTS47
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Jul 06, 2012 07:06 |  #14

Did the people who are having issues with this lens on a 5D3 install the latest firmware update? I believe it had a line in there about the 40mm pancake...

-Mike




  
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dave_bass5
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Jul 06, 2012 07:12 |  #15

LowriderS10 wrote in post #14677802 (external link)
Thanks, Dave! So far, thankfully it seems that it only happens to people once and then the lens continues behaving well for most people :)

Yeah, maybe we just need to be more careful with this lens.
I do know that the one time it happened to me was the one time i did park the barrel back manually, although i didnt push it in and the camera was still on.
Maybe there will be some sort of FW upgrade to help with this.


Dave.
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AF problems with your 40mm Pancake? Please post your Serial Number.
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