The Sigma 28-300mm f3.5-6.3 Macro is an ultra
compact lens with a 62mm filter and a 10.7:1 zoom ratio making itthe ideal
travelling companion. This versatile, all-purpose zoom can capture a wide
ranging series of subjects using its wide angle, ultra-telephoto and close-up
It incorporates two Special Low Dispersion SLD glass elements and four Aspherical
Lenses, that Sigma say will produce a high level of optical performance.
Aspherical lenses provide excellent correction for all types of aberration
while making a very compact construction possible. This lens has a minimum
focusing distance of 50cm at all focal lengths. Equipped with a macro mechanism
for close-up photography at 300mm telephoto, with a reproduction ratio of
1:3. It is equipped with a zoom lock to prevent the zoom setting from being
changed inadvertently. It incorporates an internal focusing system, which
eliminates front lens rotation, allowing the use of polarizing filters and
Petal type hoods. The lens materials used in this new lens are lead and
arsenic free ecological glass.