Tamron 17-50 front focus problem

[falcon007]

Hi all, my tamron 17-50 lens has front focus problem after I tested it . It is the most pronounce at f/2.8 where DOF is very shallow.

I still have 8 months of shop warranty. Do I take back to the shop or should I send the lens to Tamron service center to recalibrate again? Your advices would be much appreciated, thanks!

[GELworkz]

hi buddy, so wats e verdict n outcome after "going in"?

cos i thinking of getting this lens brand-new. but ur experience will make pple like me think twice

[eosdigital]

Be prepared to wait 3-4 weeks if you send in to Tamron Service Centre,as there's none here and the distributer will ship it back to Japan's division

[Pokka]

How's the other lens holder using it ? Got any comments?

[Octarine]

Check this thread for more feedback about the lens: http://www.clubsnap.com/forums/showthread.php?t=293597

[geeesus]

guys im planning to buy this lens n would like to know wat to look out for? I'm using a D200. Sorry TC for crashing ur thread.

[GELworkz]

Originally Posted by Octarine Check this thread for more feedback about the lens: http://www.clubsnap.com/forums/showthread.php?t=293597

thanks for highlighting. that thread has been closed
so any more others have any issues/feedback for would-be owners to look out for?

[Curry]

best can try out before purchasing. if bad copy after purchase, then need waste time at tamron service center....head 4 weeks.

[falcon007]

My Tamron is made in Japan. I bought it second hand from a CSer...still have 8 months of shop warranty though.

The problem with this lens is at 17mm f/2.8. I find the front focus most severe at low light condition. However, stop down to f/4 and more the focus is ok. Well, as most of you might have experienced, we normally use 17mm for landscape and usually use at least f/8...so problem is not so serious.

Having that all said, I must say the Tamron is really a good lens (cheap too!) for hobbyist like me. I will still recommend this lens for those who are thinking of getting one, but please test the lens for focus accuracy before buying.

[Legoz]

Actually, is it a front focus prob or is it a case of a too shallow DOF?
Do u have any test pics to show?

[falcon007]

Originally Posted by Legoz Actually, is it a front focus prob or is it a case of a too shallow DOF? Do u have any test pics to show?

It's confirmed front focus. Because I test shot with both AF and manual, and the result is manual focus is sharper.

Sorry I don't know how to upload pics yet.

[GELworkz]

Originally Posted by falcon007 It's confirmed front focus. Because I test shot with both AF and manual, and the result is manual focus is sharper. Sorry I don't know how to upload pics yet.

if u dun mind, can u email to me the test shots so i can take a look n judge myself?
my emial address is: gelworkz@photographer.net

TIA

[chris3210]

Does Tamron charge us for this front / back focus problem? since it's not user's fault.
Especially those lens which warranty had ended.

[Shen siung]

you may wish to contact Tamron Sg distrobutor
Tamron Singapore Distributor
JEL CORPORATION (HOLDINGS) LTD

JEL Centre

11 Changi North Way

Singapore 498796

Tel:* (65) 6248 5333

*******(65) 6841 1000

Fax: (65) 6881 1000

[chris3210]

Thanks Shen Siung

[JPLim]

Originally Posted by chris3210 Does Tamron charge us for this front / back focus problem? since it's not user's fault. Especially those lens which warranty had ended.

Do let us know if you have the reply from JEL.
Thanks