HD Pentax-DA 1.4X AF Rear Converter AW

Teleconverter • Digital era

Specification

Production details
Announced:February 2014
Production status: In production
Original name:HD PENTAX-DA 1.4x AW AF REAR CONVERTER
System: Pentax K APS-C (2003)
Optical design
Magnification factor:1.4x
Maximum format:APS-C
Mount:Pentax K
Lens construction:4 elements - 3 groups
Physical characteristics
Weight:126g
Maximum diameter x Length:⌀65×20mm
Weather sealing:Dust-proof and water-resistant barrel
Super Protect (SP) coating:-

*) Source of data: Manufacturer's technical data.

Manufacturer description #1

DENVER, CO, February 5, 2014 – Ricoh Imaging Americas Corporation (Ricoh Imaging) is pleased to announce the release of the HD PENTAX DA AF 1.4X AW rear converter. Measuring only 20 millimeters in length, the compact, lightweight HD PENTAX DA AF 1.4X AW rear converter closes the gap between the photographer and subject, enhancing the versatility of their telephoto lenses by extending the focal length by 40%.

Optimized for Ricoh Imaging’s acclaimed lineup of PENTAX K-mount lenses, the HD PENTAX DA AF 1.4X AW rear converter is the ideal product for the photographer that requires the additional flexibility accompanied by added focal length. Additionally, the HD PENTAX DA AF 1.4X AW rear converter has been engineered to maintain the autofocus (AF) functionality while working seamlessly with both camera-driven as well as lens-driven AF systems.

"The introduction of the HD PENTAX rear converter exemplifies our commitment to providing photographers with useful products and accessories that enable them to execute their creative vision," said Jim Malcolm, Executive Vice President, Ricoh Imaging. "The rear converter makes good on that promise by giving photographers the extra focal length they need to realize the image."

Composed of four elements in three groups, the HD PENTAX DA AF 1.4X AW rear converter features superior optics and incorporates the PENTAX-developed HD coating. This high-grade, multi-layer coating is designed to minimize reflectance inside the converter while optimizing light transmittance letting the user capture crisp, high-contrast images free of flare and ghosting, even under adverse backlit conditions.

Finally, thanks to its three airtight seals, photographers can combine Ricoh Imaging’s lineup of PENTAX weather-resistant, dustproof DSLRs and lenses to assemble a dependable digital imaging system that performs superbly even under harsh outdoor conditions.

Major Features

1. 1.4-times focal length extension

By mounting this rear converter between the camera body and main lens, the user can extend the focal length 1.4 times.* Measuring only 20 millimeters long, its compact, lightweight design allows the user to more easily reach out to distant subjects. The minimum focusing distance of the main lens is retained despite the extended focal length, providing for the capture of larger, more detailed images of subjects in close-up shooting.

*When this rear converter is mounted, the lens maximum aperture will be smaller (darker) by 1 step.

2. AF compatibility Maintained

When coupled with an AF lens, the autofocus operation can be performed. This rear converter works perfectly with both the camera-driven AF system and the lens-driven AF system (such as the SDM- and DC- series lenses).**

**The camera’s firmware must be updated to the latest version before using the autofocus function. Compatible camera bodies are: K-3, K-50, K-500, K-30, K-5 II, K-5 II s, K-5, K-01, K-7, and K-r. Autofocus is possible with a PENTAX lens having maximum aperture of f/4 or brighter.

3. Weather-resistant, dustproof construction for active outdoor shooting

Equipped with three airtight seals, this model is the first PENTAX rear converter with a weather-resistant, dustproof construction.

4. Exceptional optical performance

Thanks to its state-of-the-art optical design, this rear converter assures the exceptional optical performance that optimizes the potential of the master lens. The application of PENTAX-developed HD coating*** — a high-grade, multi-layer coating designed to minimize reflectance inside the converter while optimizing light transmittance — lets the user capture crisp, high-contrast images free of flare and ghost images, even under such adverse lighting conditions as backlight.

*** HD stands for High Definition.

Manufacturer description #2

This compact, high-performance rear converter not only extends the focal length of the main lens by 1.4 times, but also accommodates the flawless autofocus operation of the main lens, and features a dependable weather-resistant, dustproof construction for all-weather shooting.

By mounting this rear converter between the camera body and main lens, the user can extend the focal length by 1.4 times. Measuring only 20 millimeters long, its compact, lightweight design allows the user to more easily reach out to distant subjects.

*When this rear converter is mounted, the lens maximum aperture will be smaller (darker) by 1 step.

When coupled with an AF lens, the autofocus operation can be performed by the main lens. This rear converter works perfectly with both the camera-driven AF system and the lens-driven AF system (such as the SDM- and DC- series lenses).

Compatible camera bodies are: K-1 Mark II, K-1, K-3 Mark III, K-70, KP, K-3II, K-S2, K-S1, K-3, K-50, K-30, K-5 II, K-5 II s, K-5, K-01, K-7, and K-r.

*When this converter is mounted between a 35mm full-frame SLR camera body and a D FA-series lens, the image size is automatically cropped to the APS-C format.

Equipped with three airtight seals, this model is the first PENTAX rear converter with a weather-resistant, dustproof construction. By combining it with PENTAX’s weather-resistant, dustproof camera body and lens, the user can assemble a dependable digital imaging system that performs superbly even under harsh outdoor conditions, such as in the rain or in a cloud of dust or sand.

Thanks to its state-of-the-art optical design, this rear converter assures the exceptional optical performance that optimizes the potential of the main lens. With the application of PENTAX-developed HD coating - a high-grade, multi-layer coating designed to minimize reflectance inside the lens while optimizing light transmittance - it lets the user capture crisp, high-contrast images free of flare and ghost images, even under such adverse lighting conditions as backlight.

Compatible lenses (66)

smc Pentax-DA 10-17mm F/3.5-4.5 ED [IF] Fish-eye (Schneider-KREUZNACH D-Xenogon, Samsung SA)APS-C 2005 
HD Pentax-DA 10-17mm F/3.5-4.5 ED Fish-eyeAPS-C 2019 
smc Pentax-DA 12-24mm F/4 ED AL [IF] (Schneider-KREUZNACH D-Xenon, Samsung SA) ⌀77APS-CPro 2005 
smc Pentax-DA 14mm F/2.8 ED [IF] ⌀77APS-CPro 2004 
HD Pentax-D FA 15-30mm F/2.8 ED SDM WRPro 2016 
smc Pentax-DA 16-45mm F/4 ED AL (Schneider-KREUZNACH D-Xenon, Samsung SA) ⌀67APS-C 2003 
smc Pentax-DA* 16-50mm F/2.8 ED AL [IF] SDM ⌀77APS-CPro 2007 
HD Pentax-DA* 16-50mm F/2.8 ED PLM AW ⌀77APS-CPro 2021 
HD Pentax-DA 16-85mm F/3.5-5.6 ED DC WR ⌀72APS-C 2014 
smc Pentax-DA 17-70mm F/4 AL [IF] SDM ⌀67APS-C 2008 
HD Pentax-DA 18-50mm F/4-5.6 DC WR RE ⌀58APS-C 2015 
smc Pentax-DA 18-55mm F/3.5-5.6 AL (Schneider-KREUZNACH D-Xenon, Samsung SA) ⌀52APS-C 2004 
smc Pentax-DA 18-55mm F/3.5-5.6 AL II (Schneider-KREUZNACH D-Xenon, Samsung SA) ⌀52APS-C 2008 
smc Pentax-DA L 18-55mm F/3.5-5.6 AL ⌀52APS-C 2008 
smc Pentax-DA 18-55mm F/3.5-5.6 AL WR ⌀52APS-C 2009 
smc Pentax-DA L 18-55mm F/3.5-5.6 AL WR ⌀52APS-C 2013 
smc Pentax-DA 18-135mm F/3.5-5.6 ED AL [IF] DC WR ⌀62APS-C 2010 
smc Pentax-DA 18-250mm F/3.5-6.3 ED AL [IF] (Samsung SA) ⌀62APS-C 2007 
smc Pentax-DA 18-270mm F/3.5-6.3 ED SDM ⌀62APS-C 2012 
HD Pentax-DA 20-40mm F/2.8-4 ED DC WR Limited ⌀55APS-C 2013 
HD Pentax-D FA 21mm F/2.4 ED DC WR Limited ⌀67Pro 2021 
HD Pentax-D FA 24-70mm F/2.8 ED SDM WR ⌀82Pro 2015 
HD Pentax-D FA 28-105mm F/3.5-5.6 ED DC WR ⌀62 2016 
smc Pentax-FA 31mm F/1.8 AL Limited ⌀58 2001 
HD Pentax-FA 31mm F/1.8 Limited ⌀58 2021 
smc Pentax-DA 35mm F/2.8 Macro Limited ⌀491:1 @ CFD 0.139mAPS-C 2008 
HD Pentax-DA 35mm F/2.8 Macro Limited ⌀491:1 @ CFD 0.139mAPS-C 2013 
smc Pentax-DA 35mm F/2.4 AL ⌀49APS-C 2010 
smc Pentax-FA 35mm F/2 AL (Schneider-KREUZNACH D-Xenogon) ⌀49 1999 
HD Pentax-FA 35mm F/2 ⌀49 2019 
smc Pentax-DA 40mm F/2.8 Limited ⌀49APS-CPancake lens 2004 
HD Pentax-DA 40mm F/2.8 Limited ⌀49APS-CPancake lens 2013 
smc Pentax-FA 43mm F/1.9 Limited ⌀49Pancake lens 1997 
HD Pentax-FA 43mm F/1.9 Limited ⌀49Pancake lens 2021 
smc Pentax-D FA 50mm F/2.8 Macro ⌀491:1 @ CFD 0.195m 2004 
smc Pentax-DA 50mm F/1.8 ⌀52APS-C 2012 
smc Pentax-FA 50mm F/1.4 ⌀49Pro 1991 
HD Pentax-D FA* 50mm F/1.4 SDM AW ⌀72Pro 2018 
HD Pentax-D FA* 50mm F/1.4 SDM AW Silver (600 units) ⌀72Pro 2020 
smc Pentax-DA* 50-135mm F/2.8 ED [IF] SDM ⌀67APS-C 2007 
smc Pentax-DA 50-200mm F/4-5.6 ED (Schneider-KREUZNACH D-Xenon) ⌀52APS-C 2005 
smc Pentax-DA L 50-200mm F/4-5.6 ED ⌀52APS-C 2008 
smc Pentax-DA 50-200mm F/4-5.6 ED WR ⌀49APS-C 2009 
smc Pentax-DA L 50-200mm F/4-5.6 ED WR ⌀49APS-C 2013 
smc Pentax-DA* 55mm F/1.4 SDM ⌀58APS-CPro 2008 
HD Pentax-DA 55-300mm F/4.5-6.3 ED PLM WR RE ⌀58APS-C 2016 
smc Pentax-DA 55-300mm F/4-5.8 ED ⌀58APS-C 2008 
smc Pentax-DA L 55-300mm F/4-5.8 ED ⌀58APS-C 2009 
HD Pentax-DA 55-300mm F/4-5.8 ED WR ⌀58APS-C 2013 
smc Pentax-DA* 60-250mm F/4 ED [IF] SDM ⌀67APS-C 2008 
smc Pentax-DA 70mm F/2.4 Limited ⌀49APS-CPancake lens 2006 
HD Pentax-DA 70mm F/2.4 Limited ⌀49APS-CPancake lens 2013 
HD Pentax-D FA* 70-200mm F/2.8 ED DC AW ⌀77Pro 2015 
HD Pentax-D FA* 70-200mm F/2.8 ED DC AW Silver (600 units) ⌀77Pro 2020 
HD Pentax-D FA 70-210mm F/4 ED SDM WR ⌀67Pro 2020 
smc Pentax-FA 77mm F/1.8 Limited ⌀49 1999 
HD Pentax-FA 77mm F/1.8 Limited ⌀49 2021 
HD Pentax-D FA* 85mm F/1.4 ED SDM AW ⌀82Pro 2020 
HD Pentax-D FA* 85mm F/1.4 ED SDM AW Silver (600 units) ⌀82Pro 2020 
smc Pentax-D FA 100mm F/2.8 Macro WR ⌀491:1 @ CFD 0.303mPro 2009 
HD Pentax-D FA 100mm F/2.8 ED AW Macro ⌀491:1 @ CFD 0.303mPro 2022 
HD Pentax-D FA 100mm F/2.8 ED AW Macro Silver (300 units) ⌀491:1 @ CFD 0.303mPro 2022 
HD Pentax-D FA 150-450mm F/4.5-5.6 ED DC AW ⌀86Pro 2015 
smc Pentax-DA* 200mm F/2.8 ED [IF] SDM ⌀77APS-CPro 2008 
smc Pentax-DA* 300mm F/4 ED [IF] SDM ⌀77APS-CPro 2008 
HD Pentax-DA 560mm F/5.6 ED AW DC ⌀112APS-CPro 2012 
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35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2

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Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.

Format

Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),

where:

CF – crop-factor of a sensor,
FL – focal length of a lens.

Mount

A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.

The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.

Speed

The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Fixed diaphragm

The aperture setting is fixed at F/ on this lens, and cannot be adjusted.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.

Weight

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.

Filters

Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.

Teleconverters

Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.