Pentax 55-300mm f4.5-6.3 ED HD DA PLM WR RE

Pentax 55-300mm f4.5-6.3 ED HD DA PLM WR RE

A compact telephoto zoom lens for use with PENTAX K-mount digital SLR cameras, delivering enhanced AF performance and a minimum focusing distance of 0.95 metres.

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Total Price £429.00
MPN Code 21277
EAN Code 027075296640
SKU 16718

Pentax 55-300mm f4.5-6.3 ED HD DA PLM WR RE

This zoom lens provides focal lengths between 84.5mm and 460mm (in the 35mm format)* to cover medium-to super-telephoto ranges. Its upgraded AF performance ensures that it delivers quiet, high-speed AF operation in still-image shooting, as well as smooth AF tracking operation during movie recording to minimise noise caused by focus and aperture shifts. Its newly designed, high-quality optics provide a minimum focusing distance of 0.95 metres, expanding the range of photographic applications. With the incorporation of a retractable structure, it measures a mere 89 millimetres in length, which coupled with its weather-resistant construction, ensures this zoom lens delivers outstanding reliability and durability even in demanding shooting conditions.

* When mounted on a PENTAX APS-C-format digital SLR camera.

Main Features

1. High-speed AF operation

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 is quieter than the existing model.* When mounted on the new PENTAX K-70 digital SLR camera body, it offers 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. Performance of its power-assisted focus system during manual-focus operation has also been improved. The distance ring is designed to accurately detect the angle of rotation and swiftly react to a change of angle, so this zoom lens can shift its focusing lens smoothly in response to distance ring operation.

* When compared with the HD PENTAX-DA 55-300mm F4-5.8ED WR
** When taking a still image in viewfinder shooting, with the camera’s AF mode set to AF-S and for subjects positioned at a distance between 1.5 metres to infinity

2. 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 delivers 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 provides smooth AF tracking operation and exposure control, while minimising the intrusion of focus and aperture-shift noises during movie-recording operation. As a result, it produces more natural, true-to-life movies in locations such as a theatre stage or forest where brightness levels fluctuate considerably, as well as for moving subjects like sports people and animals.

* This lens features a KAF4 lens mount compatible with an electromagnetic diaphragm control system. In order to use this lens, the camera’s firmware must be upgraded to the latest version (except for the PENTAX K-70). Cameras compatible with this system are: K-1, K-3 II, K-S2 and K-S1. If this lens is mounted on a camera without the proper firmware upgrade, its diaphragm control mechanism becomes inactive, making it impossible to obtain the correct exposure. 

3. High-quality images, with a minimum focusing distance of 0.95 metres

With focal lengths from 84.5mm to 460mm (in the 35mm format), this telephoto zoom lens provides approximately 5.5-times zoom coverage from medium to super-telephoto ranges. Its 14-element, 11-group optics include an ED (Extra-low Dispersion) optical element to effectively minimise spherical and chromatic aberrations, while delivering high-resolution, fine-detailed images with rich contrast from the image’s centre to its edges and minimal colour bleeding at any focal length setting. In addition to the short minimal focusing distance of 0.95 metres, made possible by the rear-focus system, 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.

4. Compact telephoto zoom lens

Its retractable structure means that the lens is only 89 millimetres long. It is extremely compact, weighing it at just 442g, making it extremely portable.  The ideal lens for casual, everyday shooting.

5. Weather-resistant construction

The lens features a dependable weather-resistant construction with 11 sealing parts to effectively prevent the instrusion of water in the lens. 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 situations such as mist or rain, or in locations prone to water splashes or spray.

6. HD Coating to optimise image description

The lens is treated with a high-grade, multi-layer HD Coating.* Compared with conventional multi-layer coatings, this PENTAX-original coating delivers higher light transmittance and less reflection for bright, high-contrast images free of flare and ghost images, even in demanding lighting situations such as low light.

* HD stands for High Definition.

7. Other features

  • 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 minimising the streaking effect of point light sources.

Product Specification

  • Focal Length
    • 55-300mm "Equivalent to 84.5-460mm in 35mm format (when attached to PENTAX APS-C size DSLR cameras)"
  • Maximum Aperture
    • F4.5-6.3
  • Minimum Aperture
    • F22-32
  • Lens Construction
    • 14 elements in 11 groups
  • Angle of View (Diagonal)
    • "29-5.4° (when attached to PENTAX APS-C size DSLR cameras)"
  • Mount
    • KAF4
  • Minimum Focusing Distance
    • 0.95m (3.1ft.)
  • Maximum Magnification
    • 0.30x
  • Filter Diameter
    • 58mm
  • Diaphragm Control
    • "Electromagnetic diaphragm Fully automatic"
  • Number of Diaphragm Blades
    • 9
    • Rounded diaphragm (55mm: F4.5-9 300mm: F6.3-13) 
  • Lens Hood
    • PH-RBK58 (included)
  • Lens Cap
    • O-LC58 (included)
  • Lens Case
    • S80-120 (optional)
  • Maximum Diameter x Length
    • approx. 76.5mm x 89mm (approx. 3in. x 3.5in.) Weight "approx. 442g / with hood approx. 471g (approx. 15.6 oz./ with hood approx. 16.6oz.)"
  • Temperature
    • -10°C~40°C (14°F~104°F)
  • Humidity
    • 85% or less (no condensation)
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Pentax 55-300mm f4.5-6.3 ED HD DA PLM WR RE reviews verified by reevoo
Verified reviews of Pentax 55-300mm f4.5-6.3 ED HD DA PLM WR RE

out of 10

6 reviews

Ease of use
Image quality
Build quality
Value for money
Overall rating
Scores 8.8 out of 10 based on 6 reviews
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out of 10


Ipswich GB Keen amateur.
Very compact, especially with the reversible hood storage. Reasonably lightweight can be hand held at maximum zoom and produce good results.
Confirmed purchase: 22 May 2020
Published on: 01 June 2020
out of 10


Aberystwyth GB Old loyal Pentax user
Perfect companion to Pentax K70 for tough outdoor conditions
None I have discovered so far
Confirmed purchase: 22 November 2017
Published on: 05 December 2017
out of 10


Market Rasen. GB
Reviewer left no comment
not the easiest to focus.
Confirmed purchase: 10 July 2017
Published on: 24 July 2017
out of 10


Kent GB A keen hobby photographer
Extremely well constructed and looks a quality lens. There's no wobble at all in the extended barrel. A very useful zoom range. I already had Pentax 50-135 and 150-450 lenses but the latter is too heavy to use as a walk-about lens. The new 55-300 PLM fills that role perfectly. Extremely quick and silent to focus. Note that to use this lens with my Pentax K-3 I needed to update the camera's firmware. Definitely recommended.
Not the sharpest lens but certainly more than adequate and better than missing the shot. At 300mm it requires a steady hand or better still a tripod. Comments I have heard elsewhere about the zoom ring being a little 'stiff' do not apply to my example of the lens. It's fine.
Confirmed purchase: 30 December 2016
Published on: 25 January 2017

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