High-speed AF operation
By driving this focusing lens using a pulse motor (PLM), which is directly linked to a lead screw, this zoom lens operates faster, approximately 8.3x at its wide-angle end and approximately 1.7x at its telephoto end. When mounted on the new PENTAX K-70 digital SLR camera body, 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.
Quiet AF operation and electromagnetic diaphragm control, perfect for movie recording
This is the first K-mount lens to feature an electromagnetic diaphragm control system. When mounted on the new PENTAX K-70 digital SLR camera body, it assures smooth, high-precision aperture control during movie recording. Thanks to this state-of-the-art system, it shifts the aperture setting automatically and smoothly, even when the brightness level of the subject changes drastically in movie shooting. Coupled with the PLM mechanism, it also assures smooth AF tracking operation and exposure control, while minimizing the intrusion of focus- and aperture-shift noises during movie-recording operation. As the result, it produces more natural, true-to-life movies in locations such as a theater stage or a sunlight-streaked forest where the brightness level fluctuates considerably, and for such active subjects as athletes and animals.
High-quality images, with a minimum focusing distance of 0.95 meters
With focal lengths from 84.5mm to 460mm (in the 35mm format), this telephoto zoom lens provides approximately 5.5x zoom coverage from medium- to super-telephoto ranges. Its 14-element, 11-group optics include an ED (Extra-low Dispersion) optical element to effectively minimize spherical and chromatic aberrations, while delivering high-resolution, fine-detailed images with rich contrast from the image’s center to its edges and minimal color bleeding at any focal length setting. The lens barrel has also been designed to be free of extension during AF operation, making it ideal for a wide variety of applications, such as outdoor, sports and landscape shooting.
Compact telephoto zoom lens
Thanks to its retractable structure, the lens is only 89mm long. Since it weighs just 442g, it is extremely compact and handy to carry even in a limited space, such as a bag, making it ideal for casual, day-to-day shooting.
The lens features a dependable weather-resistant construction with 11 sealing parts to effectively prevent the intrusion of water into the lens interior. When paired with a weather-resistant PENTAX digital SLR camera body, it creates a durable, dependable digital imaging system that performs superbly in demanding shooting settings, even in rain or mist, or in locations prone to water splashing or spray.
HD Coating to optimize image description
The lens is treated with high-grade, multi-layer HD Coating. Compared with conventional multi-layer coatings, this PENTAX-original coating assures higher light transmittance and less reflection to deliver bright, high-contrast images free of flare and ghost images, even under demanding lighting conditions such as backlight.
– Quick-Shift Focus System allows the user to instantly switch to manual-focus operation, even when the camera’s AF system is in operation.
– SP (Super Protect) Coating applied to the front surface of the lens to effectively repel water and grease.
– Rounded diaphragm with nine blades to produce a smooth, beautiful bokeh (defocus) effect, while minimizing the streaking effect of point light sources.
– Type: Telephoto Zoom
– Focal length (Equivalent in 35mm format): 55-300mm (84.5-460mm)
– Maximum aperture: f/4.5-6.3
– Minimum aperture: f/22-32
– Angle of View 29°-5.4°
– Lens construction: 14 elements / 11 groups
– Number of diaphragm blades: 9
– Minimum focusing distance: 0.95m
– Maximum Magnification: 0.30x
– Filter Diameter: 58mm
PENTAX Pentax / Ricoh RICOH HD DA 55-300MM ED PLM WR LENS