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HomePhotographyLens AccessoriesGeneral Lens AccessoriesTeleconvertersPentax 1.4x AW AF Rear Converter

Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses

BH #PE14C • MFR #37962
72 reviews
Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses
Key Features
  • PENTAX HD Multi-Layer Lens Coating
  • Weather-Resistant and Dustproof Design
  • Increases Focal Length by 1.4x
  • Reduces Lens Aperture by 1 f/Stop
The 1.4x HD PENTAX-DA AF Rear Converter AW from Ricoh is compatible with Pentax KAF2 mount lenses on select DSLR cameras. It mounts between the camera body and lens, and increases the focal length of the lens by 1.4x, while reducing the aperture by 1 f/stop. The minimum focus distance of the lens is preserved, as are auto focus and auto aperture functionality. The rear converter works flawlessly with both the camera-driven AF system and the lens-driven AF system, including that of the SDM and DC-series lenses. The camera's firmware must be updated to the latest version before using the autofocus function.
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Pentax 1.4x AW AF Rear Converter Overview

  • 1Description
  • 2PENTAX HD Lens Coating
  • 3Weather-Resistant
  • 41.4x Magnification in a Compact Form Factor
  • 5Auto Focus and Aperture Functionality
  • 6Compatible Lenses
  • 7Compatible Cameras
  • 8Bundled Accessories

The 1.4x HD PENTAX-DA AF Rear Converter AW from Ricoh is compatible with Pentax KAF2 mount lenses on select DSLR cameras. It mounts between the camera body and lens, and increases the focal length of the lens by 1.4x, while reducing the aperture by 1 f/stop. The minimum focus distance of the lens is preserved, as are auto focus and auto aperture functionality. The rear converter works flawlessly with both the camera-driven AF system and the lens-driven AF system, including that of the SDM and DC-series lenses. The camera's firmware must be updated to the latest version before using the autofocus function.

PENTAX HD Lens Coating

Treated with Pentax's exclusive multi-layer lens coating, which provides high light transmission and low reflectance for sharp, clear images free of flare and ghosting--even under adverse lighting conditions, such as backlighting.

Weather-Resistant

Durable, weather-resistant construction protects the converter and the barrels of compatible, weather-sealed lenses. Shoot worry-free in rainy or misty conditions and when subjected to sprays or splashes.

1.4x Magnification in a Compact Form Factor

Mounts between the camera body and lens and increases lens focal length by 1.4x (40%)--yet has a notably small form factor, measuring only 0.8" and weighing in at just 4.4 oz. This compact size allows you to reach out to distant subjects and capture blur-free shots more easily. Since the minimum focusing distance of the lens is retained, this converter allows you to get just as close as before--but with greater magnification for more detailed images. Keep in mind that when the converter is mounted, the lens's maximum aperture will be smaller by 1 f/stop.

Auto Focus and Aperture Functionality

Auto focus and auto aperture functionality retained when using the converter, which works flawlessly with both the camera-driven AF system and the lens-driven AF system, such as that on the SDM and DC-series lenses. The camera's firmware must be updated to the latest version before using the autofocus function.

Compatible Lenses

The converter is compatible with Pentax KAF2 mount lenses. Autofocus is possible with lenses featuring a maximum aperture of f/4 or faster.

Compatible Cameras

K-1 Mark II, K-1, 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.

Bundled Accessories

The DA Limited Soft Case for the HD PENTAX DA and smc PENTAX DA 70mm f/2.4 Limited lenses is supplied. Also included are the Lens Mount Cap K and Body Mount Cap K.
UPC: 027075273313

Pentax 1.4x AW AF Rear Converter Specs

MountPentax K
Magnification1.4x
Optical Design4 Elements in 3 Groups
Light Loss1 Stop
Length0.8" / 20 mm
Diameter2.6" / 65 mm
Weight4.4 oz / 126 g
Packaging Info
Package Weight0.56 lb
Box Dimensions (LxWxH)4.05 x 3.7 x 3.7"

Pentax 1.4x AW AF Rear Converter Reviews

On the right lens ...

By Mike
Rated 3 out of 5
Date: 2022-03-03

On the right lens and at the right aperture - for example the DFA 100mm 2.8 Macro @ f5.6 (effectively f8) - I've found pleasing rendition, reasonable sharpness and auto focusing compatible with my bird photography. On my DA 55-300 PLM at 200-300mm and @ f8 (effectively f11) it is less satisfactory but if I can avoid busy backgrounds that produce very 'nervous' bokeh, results are OK (K-3, K-70, KP). Down the road when budget permits, coupled with the more expensive DA* 300mm f4, I anticipate improved performance. Overall I'm pleased with this converter.

awesome

By danniel
Rated 5 out of 5
Date: 2022-02-05

I purchased the Pentax DA* 300mm F4 as a replacement for the previous copy that fell off the truck and was damaged. I decided this time I would also purchase the Pentax 1.4x teleconverter as well. Adding more glass on a camera is not known to make images sharper and usually degrades the image. And I have seen thousands of images taken with a teleconverter that I would have deleted from the get go for being to soft and poorly defined. But I was astounded at this Teleconverter on my lens. I can not see a discernible difference between having the teleconverter on, or off the lens. The sharpness is amazing. Note, I am using this teleconverter on a prime lens, results with a zoom will likely be less awesome and fine tuning your lens to the camera body is a good idea to gain maximum sharpness. But in my experience with this TC, It well built, heavy and more than does what was expected.

PENTAX 1.4x CONVERTER

By Jose
Rated 5 out of 5
Date: 2021-12-28

Great lens to have for your Pentax camera. No problems with it syncing with all of my other Pentax lenses.

adds the reach i need

By Cynthia
Rated 5 out of 5
Date: 2021-12-19

got it for my da*300 f-4 lens to get that extra reach I needed for birds, so far on my k20d works well, cant wait to get my k-3 mark 3

Pentax 1.4 TC

By Kevin
Rated 5 out of 5
Date: 2021-11-22

I caught this on sale. I have been wanting one for some time now and waited for the sale. I use it with 55-300 zoom and it works great. I read it works better with the 300 prime. I'm going to start saving for that one even though the 55-300 is a great zoom. As usual great dealing with B and H. If B and H has something I am looking to buy I get it there. I don't even waste my time looking elsewhere.

1.4 TC

By Kevin
Rated 5 out of 5
Date: 2021-11-15

I have been wanting one of these for years. Caught it on sale so I ordered one. Great reach on the 300 end of my 55-300. Now to save for the 300 prime. B and H is the best.

Pentax 1.4X HD Converter

By Calvin
Rated 4 out of 5
Date: 2022-02-22

Worked great using a Pentax 70-300mm zoom lens. Cannot wait to get out when the weather is nice to try using it with my PentaxDA560 lens

Does what I wanted it to do!

By Patrick
Rated 5 out of 5
Date: 2022-02-10

I was looking for something with a little more reach than my Pentax HD PENTAX-DA 55-300mm f/4.5-6.3 ED PLM WR RE Lens that I use for backyard birding and at auto racing tracks. After looking at the price of Pentax's 150-450mm lens I decided I would give the converter a try at about 1/5th of the costs. I'm just a hobbyist and shoot for my own enjoyment and just could not justify the cost of the bigger lens. I knew before purchasing that the converter had some drawbacks and was willing to work with those. I'm still on the learning curve with it but happy with what I have produced so far. Can't wait for racing to get here and try it out at the track. The attached photo taken with my trusty K3ii and the converter attached to the 55-300mm lens. F8 @ 1/400 ISO 400. 322mm

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YOUR RECENTLY VIEWED ITEMS

Will the converter work with my K70

Will the converter work with my K70
Asked by: Carol
depends on what lens you are going to use , if the lens is fast like F2.8 yes " Pentax 70-200mm"
Answered by: vilson
Date published: 2021-01-13

Will this Pentax Pentax 1.4x HD PENTAX-DA AF Rear ...

Will this Pentax Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses work on Full Frame lenses for the Pentax K-1 as it states DA AF DA for APS-C sensors and AF for Autofocus)?
Asked by: Edwin
The Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses is compatible with all Pentax KAF2 mount lenses. Autofocus is possible with lenses featuring a maximum aperture of f/4 or faster. It is only compatible with the following bodies: K-1 Mark II, K-1, 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.
Answered by: Lawrence
Date published: 2020-12-03

Will this work with a Pentax ist DS and a Sigma ...

Will this work with a Pentax ist DS and a Sigma 50-500mm (non hsm version) on both AF and MF?
Asked by: Les
If your sigma lens is Pentax K mount it will only work on manual focus , no AF
Answered by: vilson
Date published: 2021-02-03

I bought a Pentax SMCP-DA 300mm f/4 lens to use ...

I bought a Pentax SMCP-DA 300mm f/4 lens to use on my K-1. I am thinking of getting the K-1 Mark ll. Will the Pentax 1.4x HD Pentax-DA AF Rear Converter AW for K-Mount work with this camera and lens?
Asked by: Cathy
I currently use the combo of 300mm f/4 + converter on my K-1. There is no reason why the same won't work on a K-1ii as well When in full-frame mode, you may see a hint of vignetting on either body, though. It's manageable with minimal cropping.
Answered by: Roland
Date published: 2020-10-15

question

Does anyone have any experience using this lens with a Sigma 70-200 f/2.8 EX DG APO HSM lens? The camera is a Pentax K3.
Asked by: Spiro
The Sigma 70-200mm f/2.8 EX DG APO HSM lens will not lock focus when used with the Pentax 1.4X HD AW on my Pentax K-3.
Answered by: RONNIE B.
Date published: 2018-08-25

Does this work with k-70?

Does this work with k-70?
Asked by: Julie
Yes, the Pentax 1.4x HD PENTAX-DA AF Rear Converter AW for K-Mount Lenses does work on the Pentax K-70.
Answered by: Hassan
Date published: 2021-02-17

Has anyone tried this teleconverter with the K3ii ...

Has anyone tried this teleconverter with the K3ii and the Pentax 150-450mm zoom lens?
Asked by: Anonymous
Yes, users say the teleconvertor will magnify any positive or negative issues with the lens. One reviewer says "I was still very impressed, based on my experience with my K1 plus DFA 150-450 mm". Knowing that this teleconvertor is made for crop sensor cameras, using the K3ii, the results will be even better.
Answered by: Lenny
Date published: 2020-12-28

Will it work with Pentax K-5 and 150-450mm ...

Will it work with Pentax K-5 and 150-450mm 4.5-5.6 lens?
Asked by: Howard
Yes, its compatible but you will probably lose autofocus on the long end.
Answered by: Rob
Date published: 2020-07-29
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