Physical Views & Controls

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Tamron_SP_17-50mm_full_lens.jpgHere we can see a top view of the BA005 while standing on end. The lens is quite compact measuring approx 3 3/4 inches (95.25mm) when retracted at 17mm. Zooming the lens out to 50mm brings the total length without lens cap or hood to about 5 inches (127mm). The weight of the B005 is also very manageable at about 20 ounces (570 grams to be exact), which is about 5 ounces heavier than it's Non-VC predecessor, the A16.





Tamron_SP_17-50mm_lens_closeup.jpgHere we can see a nice close up look at the manual focus and zoom controls on the lens. Tamron used a typical lens construction with the focus ring at the front of the barrel and the zoom control in about the center. The nice wide grip of the zoom control is very comfortable, however the mechanism is a bit stiff. To zoom the lens you rotate the wheel in a clockwise fashion, which is the opposite of Canon's zoom lenses. At the bottom right you can also see the "Zoom Lock".


Tamron_SP_17-50mm_af_mf_vc.jpgTamron placed the AF/MF and VC switches in your typical location, which are just within reach of your left thumb when you hand is wrapped around the lens barrel. You can also see the red lens mount line-up marking, which is very large and easy to see when swapping lenses. 







b005_vc_module.jpgFirst introduced on their A005 telephoto zoom lens, Tamron has incorporated their new VC (Vibration Compensation) image stabilization system in the B005. This is a tri-axial system, which they claim gives you up to a 4 stop advantage over a non-IS lens. On the right you can see an expanded view of the VC system's complex design (photo courtesy of Tamron), which overall helps increase the chances that you'll capture blur free photos when shooting handheld and in lower lighting conditions.





Tamron_SP_17-50mm_lens_lock.jpgHere we can a close-up of the B005's "Zoom Lock", which is a simple lock mechanism that allows you to lock the lens at the 17mm, full wide position.
 


Tamron_SP_17-50mm_filter.jpgThe B005 uses a filter thread of 72mmto allow you to attach filters to the lens as well as a bayonet mount on the end for accessories like the included lens shade. They have also incorporated their BBAR (Broad-Band Anti-Reflection) coating to the front of the lens, which uses multiple layers of anti-reflective coating to help reduce lens flare and other reflections.


Tamron_SP_17-50mm_hood.jpgTamron includes a large "flower-shaped" lens shade or hood. It measures about 1.5 inches at it's longest point, and features a ribbed interior to help reduce reflections. For storage, you simply reverse the hood and attach it to the lens. However, this blocks the focus control completely.



Tamron_SP_17-50mm_mount.jpgCurrently, the B005 is being offered for both Canon and Nikon dSLRs. Above you can see the Canon EF mount, which is constructed using durable metal materials. One important note, when using the Nikon version of this lens, the Nikon dSLR must have an internal focus motor in order to use AF functionally of this lens. 


Tamron_SP_17-50mm_lens_+camera.jpgAbove you'll find a shot of the B005 seated next to my Canon EOS 50D with the BG-E2N grip installed. Below you can see several other angles with the lens mounted to the camera.



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