100-500mm F4-7.1L IS USM
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100-500mm F4-7.1L IS USM

Let's start with the more conventional lens of the trio - the 100-500mm F4-7.1L IS USM, which first appeared in mockup form at events earlier this year (remember when we had events?) featuring 20 elements in 14 groups, this is a complex design, which incorporates six UD (Ultra Low-Dispersion) elements and one 'Super' UD element. These elements should help control chromatic aberrations.