On November 25 last, Tamron announced the launch of the successor of its venerable 200-500mm f/5-6.3 ultra tele-zoom (test), the Di SP 150-600mm F/5-6.3 VC USD.
What does that letter-soup stand for?, do you wonder.
Di means “Digitally Integrated”, Tamron speak to indicate that this lens is specifically designed and optimized for digital cameras, be that FX (Full-Frame) or DX (APS-C) crop-sensor models.
SP (Super Performance) indicates that the 150-600 is part of Tamron’s top-of-the-line – akin to Sigma’s EX-Series – while VC is the companies’ term for vibration control or reduction, VR in Nikon speak, and called OS (optical stabilization) by Sigma.
Finally, USD (Ultrasonic Silent Drive) indicates that the lens is motorized, again akin to Nikon’s Silent Wave Motor (SWM) and Sigma’s HSM, which means that it can auto focus on all Nikon cameras, including the “Baby Nikons” – such as the D3000 and D5000 series – which lack a built-in focus motor.
Moreover, AF motors built into lenses are generally faster than the one inside the camera; thus, even Nikon motorized cameras ought to benefit and focus faster with this monster.
Keep in mind that, although this lens focuses internally, it is not IF, which means that it extends considerably when zoomed. With the lens hood attached, it virtually doubles its length at the 600mm end.
|© Bryan Carnathan, the-digital-picture.com|