Tamron has launched a firmware update for the Tamron 25-200mm f/2.8-5.6 Di III VXD G2 that’s quite frankly mind-boggling. Rather than the usual tame improvements and bug fixes, firmware Ver. 3 actually increases the E-mount lens’ magnification ratio. I’m not even sure how that’s possible – but it is!
The magnification ratio at focal lengths of 25-70mm has been increased to 1:2 or greater. This is sometimes referred to as "half macro", given that a 1:1 ratio is known as "true macro". True macro is when a lens is able to focus close enough to a subject that it can be replicated at life size on the sensor.
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