Complex sentence: On the extending lens barrel, another set of magnification markings can be found, which range from 1:4 to 1:1 and correspond to the magnification factors when used with the optional Life-Size Converter EF (see below).
Split into simpler sentences: On the extending lens barrel, another set of magnification markings ranging from 1:4 to 1:1 can be found. These markings correspond to the magnification factors when used with the optional Life-Size Converter EF (see below).