Stuck aperture in Tamron 70-200/2.8?

Illuwatar · 06-30-2009, 11:08 AM

Noticed a strange thing with my new Tamron 70-200/2.8 when testing some shots in the garden: the images went over-exposured when stopping down the lens (this time to 8, but it should not matter). The DOF control did not work either, lens stayed fully open. I removed the lens and touched the mechanical coupling for the aperture - it was stuck. With some light force, I pushed it back in action and everything was working as usual (images and DOF ok). Anyone seen this and what to do about it - use the lens more so it wears in?

**pentaxman** · 06-30-2009, 11:29 AM

I had this same problem and returned the lens for a refund. If you cannot get a refund, see if you can get it repaired under warranty. If you read the lens reviews at B&H photo, out of 10 reviews, there are two with sticking apertures - this seems like it might be a prevalent quality problem with this lens.

Tamron | 70-200mm f/2.8 Di LD (IF) Macro AF Lens | AF001P-700

06-30-2009, 11:08 AM	#1
Illuwatar Junior Member Join Date: Mar 2009 Location: Stockholm/Sweden Photos: Gallery Posts: 29	Stuck aperture in Tamron 70-200/2.8? Noticed a strange thing with my new Tamron 70-200/2.8 when testing some shots in the garden: the images went over-exposured when stopping down the lens (this time to 8, but it should not matter). The DOF control did not work either, lens stayed fully open. I removed the lens and touched the mechanical coupling for the aperture - it was stuck. With some light force, I pushed it back in action and everything was working as usual (images and DOF ok). Anyone seen this and what to do about it - use the lens more so it wears in?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Tamron 70-200 sticky aperture	yusuf	Pentax SLR Lens Discussion	21	09-30-2010 08:36 PM
Tamron 70-200 aperture stuck	donelly duck eclair	Pentax SLR Lens Discussion	5	08-30-2009 04:48 PM
Stuck Aperture	pygmalionundone	Pentax SLR Lens Discussion	10	02-23-2009 12:47 PM
Aperture got stuck!	Big I	Pentax SLR Lens Discussion	4	08-06-2008 07:22 PM
HELP: Tamron SP 80-200/2.8 aperture problem.	CGJung	Pentax SLR Lens Discussion	4	08-18-2007 07:35 PM

06-30-2009, 11:29 AM	#2
pentaxman Site Supporter Join Date: Oct 2007 Location: Washington Photos: Gallery Posts: 250	I had this same problem and returned the lens for a refund. If you cannot get a refund, see if you can get it repaired under warranty. If you read the lens reviews at B&H photo, out of 10 reviews, there are two with sticking apertures - this seems like it might be a prevalent quality problem with this lens. Tamron \| 70-200mm f/2.8 Di LD (IF) Macro AF Lens \| AF001P-700