??This 300mm F6.3 lens is computer-designed using a combination of lenticular light refraction and reflection optics--the same physics used in many professional telescopes.<br> <br> Features:<br> 300mm f/6.3 Studio Series Telephoto Mirror Lens.<br> Multi Coated low-dispersion glass£¬ anti-reflection coating.<br> A Multi-coated low-dispersion glass capable of producing sharp£¬ high definition images.<br> This gives you very sharp picture quality with less color aberration£¬ which is considered the most harmful factor in the field of telephoto photography.<br> Suit for Micro M4/3 Mount Camera.<br> <br> Specifications:<br> Focal length: 300mm<br> Lens Construction: 7 Elements in 4 Groups<br> Angle of View: 5 degrees diagonal<br> Aperture Range: F6.3<br> Minimum Focusing Distance: 0.8m / 31.5in<br> Filter size: 55mm<br> Package size: 14.5 * 10.5 * 11cm / 5.7 * 4.1 * 4.3in<br> Package weight: 423g / 14.89oz<br> <br> Package List:<br> 1 * Lens<br> 1 * Front Lens Cap<br> 1 * Rear Lens Cap<br> 1 * Hood<br> 1 * Lens Bag<br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>  <br>