DA* 16-50mm Serial Number Database.

[jonmay]

Serial No. 9011402
Bought from Imaging World (ebay Store) Oct 2007

good copy

[Adrian Owerko]

sn 9022119 good copy

16mm @ f4 @ iso 100 @ 5min exposure

Moonrise Energy

[jpdsr3]

Where do I find the database?
Thanks

[bc_the_path]

I think it is the thing that is created by all the messages ( except yours and mine, perhaps ) in this thread...
>Where do I find the database?
>Thanks

[sewebster]

Originally Posted by jpdsr3

Where do I find the database?
Thanks

This thread _IS_ the database. Occasionally someone posts a message with a collection of all the good and bad serial numbers. Go back through the pages to find the most recent one.

[Mark2100]

#9012487 Good copy. Bought at Epperson Photo in Oklahoma City March 08

[Graham67]

9024304 is a keeper.

Bought at Jacobs in Leicester, UK.


G

[John K]

I got mine from a website in Germany - serial 9022891. It seems to be close but not quite right. It loses focus on the right side of the image. These are at F8 at 28mm.
left side: middle: right side:
left side: right side:

I'm tempted to send it back to see if I can get a better copy - what do you think?

[TanGU]

I have the same problem as you, but with the left side being too soft, i did a topic about my problem if you want to compare my picture: http://www.pentaxforums.com/forums/p...left-side.html

[Scooter]

Originally Posted by Buddha Jones

OK, so I guess this is a long time coming, in an attempt to keep the histeria to a minimal, lets start keeping track of the good and bad serial numbers so we can try and see if there is a trend base on some facts rather than speculation.

Please help out, if you have a DA* 16-50mm please post your SN# here and wether it is a good or a bad copy and if it's a bad copy where you got it from. This will help to keep count of bad vs. good and perhaps build a corrolation with the serial numbers as well.

Thanks.

Serial Number 9018541 - Purchased from Digital City in Canberra Australia on 14/8/2008 Worked fine for 2 months then the auto focus failed and there was unusual noise from inside the lens when the focus ring was turned.

[Cooties]

sn 9013560 - Bad
Bought from Digital Camera Warehouse in Sydney (received 20/10/08).

Badly de-centred, right side of the image bad up till f8 (and even then it wasn't great). Sending back for replacement.

[TanGU]

Originally Posted by Cooties

sn 9013560 - Bad
Bought from Digital Camera Warehouse in Sydney (received 20/10/08).

Badly de-centred, right side of the image bad up till f8 (and even then it wasn't great). Sending back for replacement.

can you post a link showing the problem?

It will be nice if everyone else having a problem can post a link showing it.

And BTW, since this topic started 3 months ago, it will be nice of the OP to post some report of the "database"

[Cooties]

Originally Posted by TanGU

can you post a link showing the problem?

It will be nice if everyone else having a problem can post a link showing it.

And BTW, since this topic started 3 months ago, it will be nice of the OP to post some report of the "database"

I'll post some photos tonight when I get home from work.

Images Added:
Newspaper Test: Taken at 29mm and f2.8
Centre, Bottom Right, Bottom Left, Bottom Right at f8.0

Then a real world test at 16mm f2.8 (its even obvious when resized to 800 pix wide !!)

[pm42]

Mine is number 9024855, bought 1 month ago at Fnac Forum, Paris, France.
Maybe not the sharpest ever made but still ok. Well-centered, AF ok after a +5 correction on the K20D.

[TanGU]

Tested 5 of them, 4 was bad (the other, a demo that i wasn't able to buy), either bad centered or with a front focus problem, i didn't took all the SN in note (tested all lens directly at the store, with the focus chart!), but here's two i've took: 9025155 & 9030210, so i'm not very proud of Pentax right now, because wasn't able to buy any working 16-50mm lens. And i'll stop searching until Pentax do a mass recall, or a very very GOOD batch (if it is possible of them...)