Short minimum focusing distance of 0.95m. PENTAX's first K-mount with electromagnetic diaphragm control system for a quiet sound operation during movie recording</br>Rear focus system and PLM (pulse motor), direct drive lead screw system for quite zoom a High-speed AF. Compact telephoto zoom lens thanks to its collapsible structure</br>Weather-resistant construction ED lens elements for brilliant sharpness and saturated colors</br>HD coating to optimize light transmittance and minimize reflection Quick-Shift Focus System to instantly change the AF mode to MF by twisting the focus ring</br>SP (Super Protect) Coating applied to the front surface of the lens to effectively repel water and grease Rounded diaphragm to produce a beautiful bokeh</br></br>Product Description</br></br>With the adoption of a rear-focus system, the focusing lens is 93.6 percent lighter* than the previous version. By driving this focusing lens using a pulse motor (PLM), which is directly linked to a lead screw, this zoom lens operates faster - approximately 8.3 times** at its wide-angle end and approximately 1.7 times** at its telephoto end -and quieter than the existing model.* When mounted on the new PENTAX K-70 digital SLR camera body (scheduled to be launched in June, 2016), it assures smoother, faster AF operation with dimly lit subjects, thanks to an improved AF algorithm that exchanges AF data between the camera body and the lens with greater precision. Operability of its power-assisted focus system during manual-focus operation has also been improved. Since its distance ring is designed to accurately detect the angle of rotation and swiftly react to a change of angle, this zoom lens can shift its focusing lens smoothly in response to distance ring operation.</br><br/>http://www.amazon.com/gp/product/B01GVYHK42