Canon 24-70 F2.8 MK2 woes

woof woof said:
As lenses are quite complex devices comprising optical, mechanical and electronic elements and involve quite a degree of manual rather than machine processing and assembly we can hardly be surprised that duffers get through.

As with Sigma panic I personally don't think that bad samples should put people off unless there's a specific design or build issue. If there is I'd move on to something else but if the issue is just a number of bad samples I'd just do what I've always done - buy from a reputable dealer and hope that you get a good copy but have confidence that the dealer is reputable and will help you out as they should if you get a bad copy.
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Agree with this - get the retailer/manufacturer/distributor to sort it out if needs be.

I can't help thinking though that maybe there's a 'newness' issue here, as there often is with the first batches of new cameras, and they haven't quite nailed the production/assembly regime yet. We also know that some lenses undergo internal manufacturing changes (that are rarely publicised) to iron out early QC glitches.
 
Six Sigma... Don't make me laugh. Any quality system can basically be perverted and / or paid lip service to and in themselves they're no guarantee of actual product quality.

One of my previous jobs actually involved being a "Quality Manager" as in quality systems, not real world quality as in product quality. Under my watch which included over 50 accreditation audits and as many and probably more customer audits we never failed an audit, never had a Major non conformance and always got new accreditations at the first attempt. Believe me, these systems are no guarantee of real world product quality.
 
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Blimey,lots of activity in here.

I guess it all boils down to cost.It's obviously cheaper for companies to fix any problems after the fact rather than make sure nothing comes out of the factory faulty.

Well,I've given up on the 24-70 MK2 for now.I can't stand the thought of getting another bad lens.The problem is I would now be looking for the smallest problem with the lens and would any of them actually be good enough.At this stage I would probably need someone from Canon to come and plop a good copy in my hand personally.Well done Canon!You've managed to cheese another customer of 25 years off.

Gary
 
admirable said:
Can you upload the 1st image to a hosting site that would allow us to download the full size image straight out the camera? I think it would give a better idea of what is happening. That tower looks a large crop. :)
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any chance of this?
 
daugirdas said:
It should be like that.

It seems that these asian companies may have a different way of thinking though. Let me postulate my wild guesses what may go through the minds of marketing departments:

* our competitors already do this OR we worked like that for decades. We need to keep the status quo (sounds very Japanese here)
* lenses are expensive to build. binning duffers is counterproductive, and chances are most our customers won't have a clue anyway. This was certainly the case in film days, but with digital and the rise of pixel peeping not so much.
* sending a duffer for recalibration takes a lot of time and is counterproductive. Chances are it won't get returned, and even if it does we'll sell it as refurbished on ebay outlet or spend an hour and recalibrate it there and then.
* when it comes to claims, the lenses have passed QC and are within limits - so what's the problem sir?
* Finally - competitor X has just raised the prices. We'd better catch up soon! QC cab wait though...

Does that sound plausible?
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I guess anything is plausible Tomas, it depends on how cynical you want to be :lol: Personally, I can't think how it would be in the company's interest to knowingly ship faulty items or not have a QC process in place that meets a certain standard.

vulcan2912 said:
I guess it all boils down to cost.It's obviously cheaper for companies to fix any problems after the fact rather than make sure nothing comes out of the factory faulty.

Gary
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Partly, but I don't think this is entirely the case. I think what can happen is x amount of items can be shipped from Production before a problem is realized. Of course it wouldn't make business sense to recall these items (unless it's a matter of H&S) but to rely on customers instead to find fault and use the returns process. This is pretty normal. Production requires nothing to leave the factory faulty (I'm sure such companies are ISO rated and the fact that they care about their product). Knowingly shipping faulty items is both unprofessional and highly unlikely. Line stop (when issue is realized at point of production can be costly but it's usually turned around relatively quickly so that items can start shipping.

In your particular case I don't think anyone here can pass comment as to how or why, it just happens and to happen more than once is unlucky, frustrating and annoying. It doesn't need to be said that those that find faults with any product are more vocal than those that don't which aids the perception that QC is totally awry.

As for the D800 left side AF issue? It's obviously affected a number of items and why this has happened only Nikon has the process map. The same would apply to the 24-70 LII.
 
The customer in my case is paying the price and doing Canon's work for them.Upto now I'm probably at least £20 down from the purchase of these 2 lenses.

I never got any money back for the return postage to HDEW for the first lens(didn't ask for any so can't really count that-wasn't offered any either though).I've had to print/buy the labels and tape for the re-packaging and add in 2 round trips to the post office.That's before you factor in my time for doing all of the above.

Gary
 
Digifrog said:
I guess anything is plausible Tomas, it depends on how cynical you want to be :lol: Personally, I can't think how it would be in the company's interest to knowingly ship faulty items or not have a QC process in place that meets a certain standard.
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:lol: I could be just as cynical as you want :D. On a positive side it is a great way to control expenditure!!!

They all do meet a certain standard, but as it seems and was somehow communicated to me (either making a bad excuse or telling the truth :shrug:) the standards are somewhat on the lower side...

I guess OPs faulty lens would print a perfect 5x7" or even 6x9". Perhaps that is their standard, but it is rather defined by some PC generated numbers (probably centre only)

It makes sense to ship as many items "within spec" as possible without delays, so that explains QC standards.
Remember I just had 2x new 16-35 IIs through my hands and both had very similar faults like OP's 24-70. I too completely gave up on that lens :bang:
Not to say that it took me significant effort to properly sort out my 1st 24-70 mk1 through canon service, but I was much more lucky 2nd time. Not had much luck with 135mm either.
 
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vulcan2912 said:
Well,I've given up on the 24-70 MK2 for now.I can't stand the thought of getting another bad lens.The problem is I would now be looking for the smallest problem with the lens and would any of them actually be good enough.At this stage I would probably need someone from Canon to come and plop a good copy in my hand personally.Well done Canon!You've managed to cheese another customer of 25 years off.

Gary
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It's a shame really as if you go for a Sigma or Tamron you could still end up with a duffer.

How about waiting 6 months and trying again? That way you may well get a lens from a different batch. Might be worth thinking about?
 
vulcan2912 said:
The customer in my case is paying the price and doing Canon's work for them.Upto now I'm probably at least £20 down from the purchase of these 2 lenses.

I never got any money back for the return postage to HDEW for the first lens(didn't ask for any so can't really count that-wasn't offered any either though).I've had to print/buy the labels and tape for the re-packaging and add in 2 round trips to the post office.That's before you factor in my time for doing all of the above.

Gary
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Aye, I can imagine that being a little frustrating. In case you were unaware the folks at Consumer Action Group forum or Martin Lewis' Money Saving Expert forums will offer you free, accurate and professional advice.

http://www.consumeractiongroup.co.uk/forum/index.php?

http://forums.moneysavingexpert.com/

I've found them to be quite helpful in the past.

Regards
 
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