[. . . ] [. . . ] € Can be used with the optional EC-20 teleconverter in manual focusing (MF) mode. € Can be used with the optional EX-25 extension tube under the following conditions. 8 in) • Specifications are subject to change without any notice or obligation on the part of the manufacturer. Precautions: Be Sure to Read the Following Warnings: Safety Precautions • Do not view the sun through the lens. [. . . ] [. . . ]