Question about Tamron 28-75 F2.8 XR AF Lens
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Posted on Jan 02, 2017
SOURCE: auto focus problem
My first suggestion is to send it back if it is under warranty.
The grease probably got so thick, from the cold, that it caused too much resistance for the auto-focusing mechanism. You probably have damaged the focusing mechanism in the lens. You cannot repair this, yourself. I don't know how cold is too cold but it really shouldn't have done that.... Tamron makes cheap lenses. Try and exchange it for at least a Sigma.
Posted on Dec 29, 2007
This is a lens for Sony/Minolta cameras. It is not compatible with the Nikon D90. Hence a Teleconverter for Nikon will not work on this lens to mount it to a Nikon D90.
Posted on Jan 15, 2009
Make sure the lens is set for the largest f number on the aperture ring. there may be a lock to prevent the ring from turning in the future. Locking the lens of the largest f number allow the camera to set the lens through the camera. This is normal on most of the newer cameras.
If the lens does not have a move-able aperture ring, then dismount and remount the lens, making sure the lens is completely mounted and locks into place, completely lining up the contacts inside. If this does not work The camera or lens may need servicing.
Posted on Nov 24, 2009
Unfortunately this is a risk when you use third-party lenses. The camera manufacturer's lens to body protocols are not open source nor do they licence the technology to alternative suppliers, so all that companies like Tamron can do is to try and reverse engineer the system.
You only have two possible fixes:-
1. Replace the lens with a Sony Alpha model; or
2. Contact Tamron to see whether they offer an update service for your lens.
The latter is certainly possible with some brands/models, but the costs have historically varied between "you pay just the shipping and handling" right up to "it's cheaper to buy a new lens".
So you either pay a high price for Sony Alpha genuine lenses which are guaranteed to always work with Sony Alpha bodies and firmware updates, or pay repeatedly for third party lenses. "You pays your money and you takes your choice".
Posted on Jun 18, 2011
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