<ul class="tabs"> <li><a class="active" href="#tab1">Description</a></li> <li><a href="#tab2">Features</a></li> <li><a href="#tab3">Tech Specs</a></li> </ul> <ul class="tabs-content"> <li id="tab1" class="active"> <br>To meet the requirements of digital photography, the Leica Super-Elmar-M 21mm f/3.4 ASPH is a benchmark in all optical performance characteristics. The stray light optimization was implemented on a very high level, allowing for backlit shots with crystal clear contrast. The design of the metal lens hood matches the appearance of the current wide-angle lenses of the Leica M system. This lens hood is also compatible with the Leica Super Elmar-M 24 mm f/3.8 ASPH and the Leica Summilux-M 35mm/1.4. With the Leica M8 and M8.2, the Leica Super-Elmar-M 21mm/3.4 ASPH has an equivalent focal length of 28 mm making it a practical standard wide-angle lens for use with the Leica M8 and M8.2.</li> <li id="tab2"> <ul> <li>Wide angle view for architecture, street and landscape photography</li> <li>Excellent image quality at full aperture. Distortion, vignetting and chromatic aberration have been reduced to a minimum</li> <li>Convenient to carry because of its compact size</li> <li>Flare resistant design allows for images under extreme backlight conditions</li> <li>The f/3.4 lens speed in combination with the short focal length allows sharp images even in available light situations</li> <li>Metal lens hood is included in the scope of delivery</li> <li>Can be used not only with digital M-cameras but with all Leica analog M-cameras since 1954 </li> <li>Made in Germany</li> </ul> </li> <li id="tab3"> <table width="100%"> <tbody> <tr> <td width="50%"> <b>Angle of view (diagonal, horizontal, vertical)</b> </td> <td></td> </tr> <tr> <td><b>For 35mm format (24x36mm)</b></td> <td>91°, 80°, 59°</td> </tr> <tr> <td><b><b>For M8/M8.2 (18x27mm)</b></b></td> <td>74°, 64°, 46°</td> </tr> <tr> <td><b><b>Optical design</b></b></td> <td></td> </tr> <tr> <td><b><b>Number of elements / groups</b></b></td> <td>8 / 7</td> </tr> <tr> <td><b><b><b style="line-height: 1.5;">Focal length</b></b></b></td> <td>21 mm</td> </tr> <tr> <td><b><b><b>Entrance pupil</b></b></b></td> <td><b><b><span style="font-weight: normal;">15.6 mm (related to the apex of the first lens surface in light direction)</span></b></b></td> </tr> <tr> <td><b><b><b>Focusing range</b></b></b></td> <td>0.7 m (2.3 ft) to Infinity </td> </tr> <tr> <td><b><b><b><b>Distance setting</b></b></b></b></td> <td></td> </tr> <tr> <td><b><b><b><b>Scale</b></b></b></b></td> <td>combined meter/feet-increments</td> </tr> <tr> <td><b><b><b><b>Smallest object field</b></b></b></b></td> <td> <p>706 mm x 1059 mm (35mm format)</p> <p>530 mm x 795 mm (for M8/M8.2)</p> </td> </tr> <tr> <td><b><b><b><b><b style="line-height: 1.5;">Highest reproduction ratio</b></b></b></b></b></td> <td> <p><span style="line-height: 21px;">1:29.4</span></p> </td> </tr> <tr> <td><b><b><b><b><b>Aperture</b></b></b></b></b></td> <td> <p> </p> </td> </tr> <tr> <td><b><b><b><b><b><b>Setting / Type</b></b></b></b></b></b></td> <td>Preset, with clickstops (including half values), manual diaphragm</td> </tr> <tr> <td><b><b><b><b><b><b style="line-height: 1.5;">Smallest aperture</b></b></b></b></b></b></td> <td> f/16</td> </tr> <tr> <td><b><b><b><b><b><b>Bayonet</b></b></b></b></b></b></td> <td>Leica M quick-change bayonet with 6-bit bar coding for digtal Leica models</td> </tr> <tr> <td><b><b><b><b><b><b><b style="line-height: 1.5;">Filter (type)</b></b></b></b></b></b></b></td> <td>internal thread for screw-on filters size E 46</td> </tr> <tr> <td><b><b><b><b><b><b><b>Lens hood</b></b></b></b></b></b></b></td> <td>outer threading with stop for mounting the metal lens hood</td> </tr> <tr> <td><b><b><b><b><b><b><b><b>Dimensions and weight</b></b></b></b></b></b></b></b></td> <td></td> </tr> <tr> <td><b><b><b><b><b><b><b><b>Length</b></b></b></b></b></b></b></b></td> <td>43 mm (1.69 in) / 55 mm (2.17 in) (with/without lens hood attached)</td> </tr> <tr> <td><b><b><b><b><b><b><b><b><b>Largest diameter</b></b></b></b></b></b></b></b></b></td> <td>53 mm / 2.1 in</td> </tr> <tr> <td><b><b><b><b><b><b><b><b><b>Weight</b></b></b></b></b></b></b></b></b></td> <td>approx. 279 g / 9.84 oz</td> </tr> <tr> <td><b><b><b><b><b><b><b><b><b><b>Accessories included</b></b></b></b></b></b></b></b></b></b></td> <td>Metal lens hood, front cap for lens hood, rear cap, leather case, instruction manual</td> </tr> </tbody> </table> <b style="line-height: 1.5;"></b><br><br> <br><b></b> </li> </ul>