Tamron 150-600mm VC USD Lens Firmware Update Improves AF Performance on Canon DSLRs

In case you didn't notice, the Tamron 150-600mm f/5-6.3 Di VC USD Lens is currently sitting at the top of the "Most Popular Lens" leaderboard (on the home page). Impressive image quality from a very long focal length zoom lens with a very reasonable price has driven the 150-600 VC's popularity.
 
The lens has become so popular that finding one in stock has become a challenge. Amazon states "Usually ships within 1 to 3 months" for this model. The 150-600 VC is available on eBay, but be prepared to pay a premium for it. That this lens has become difficult to find has led to theories that Tamron pulled the lens from shelves or stopped production of the lens to address a deficiency. The other report I'm receiving is that the latest models of this lens are autofocusing more accurately than the early models. (thanks Chris)
 
To clear things up, I contacted my Tamron rep. What I learned is that the firmware installed on this lens has indeed been updated; starting with models produced in May 2014. The firmware update was specific to the Canon-mount version and was designed to improve autofocus performance. Unless a dealer is sitting on old inventory, all lenses currently being shipped should have the updated firmware. Lenses with the original firmware can be sent to Tamron for the update.
 
The other clarification that I received was that unavailability of this lens is entirely due to demand exceeding supply. There have been no halts to production and no recalls issued.
 
If you want to add a Tamron 150-600mm VC Lens to your kit, preorder and be patient.
Posted: 9/17/2014 9:13:42 AM CT   Posted By: Bryan
Category: Tamron News
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