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04-25-2012, 12:50 PM   #16
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The same thing happens with my Tamron 70-300 VC. The ficus goes from infinity to MFD and back. If it doesn't find focus it stops there and I need to press again. Stop worrying already! : D

PS Did the forums get new Smileys by any chance?

04-25-2012, 07:27 PM   #17
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QuoteOriginally posted by ide508 Quote
Thank you eddie for that return.
I feared that it "might" be a sign of SDM failure...
Cheers
Bernard
I highly doubt your lens will have an sdm failure,
I haven't heard of any failures to this point with the 200mm 2.8. And based on this survey no-one else has either.
You can rest easy tonight.
04-25-2012, 08:09 PM   #18
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QuoteOriginally posted by ide508 Quote
Thank you eddie for that return.
I feared that it "might" be a sign of SDM failure...
Cheers
Bernard
No, SDM failure is when the lens motor will not move the focus elements, not when it misses focus.
04-25-2012, 11:28 PM   #19
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QuoteOriginally posted by Giklab Quote
The same thing happens with my Tamron 70-300 VC. The ficus goes from infinity to MFD and back. If it doesn't find focus it stops there and I need to press again. Stop worrying already! : D
PS Did the forums get new Smileys by any chance?
QuoteOriginally posted by Chaos_Realm Quote
I highly doubt your lens will have an sdm failure,
I haven't heard of any failures to this point with the 200mm 2.8. And based on this survey no-one else has either.
You can rest easy tonight.
QuoteOriginally posted by Canada_Rockies Quote
No, SDM failure is when the lens motor will not move the focus elements, not when it misses focus.
Thank you all for those precisions !
I went to a quick search about SDM failure, and for sure it's not what experienced, knock on wood
According to that survey, it looks like the one I bought might not be a recent one according to the serial n...

I'm not worrying that much, 'cause here in Belgium we have a two years warranty period
Cheers
Bernard

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