


See Options
1 Year
$34.99
2 Year
$59.99
3 Year
$79.99
Need help? Ask our experts.
Review Summary
2018-05-29T08:49:48
Great glass
MICHAEL S.
2018-03-23T01:03:43
Everything I read on this converter before I bought it said it would work on the K-1 and it does function and operates the lens, but it is not a full frame format, your pictures will have a dark ring around the outer edges. I do not recomend this for the K-1, even though I have found no other options
DOUG W.
2017-12-04T17:17:40
Optimized for today's digital lenses, this converter is the only one that will give all DA lenses their full function on Pentax cameras.
David M.
2017-02-03T20:02:47
I bought this to go with the 300mm telephoto, don't see that many other uses for it.
BRUCE E.
2016-07-14T09:24:07
Solid all metal construction. Works as described. I like it because I have an old Tamron 70 - 300mm 'Macro' lens that becomes a 450mm lens on my K3. When I add the converter it becomes a 630mm lens. This makes it fun for wildlife shots. The other thing I like is that the minimum focusing distance does not change and this makes it great for macro. I do not see any difference with my photo quality when I use this converter.
DAN N.
2015-09-03T11:25:04
I have been using this for over an year now paired with the DA* 300/4. There is zero drop in image quality and autofocus speed, as if the two have been designed from the very beginning as parts of a 420/5.6 lens. It performs very well with DFA 100/2.8 macro and even DA 50-135/2.8, but it really shines with the DA* 300/4. Based on a quick viewfinder check with a venerable MX film camera - I expect it to be compatible with the future FF camera.
Alin F.
2014-12-22T19:00:00
Must have when shooting wildlife with a Pentax DSLR. When use with the DA* 300mm f4 it provides an effective 420mm at f5.6. The actual 420mm focal length of the combination converter and DA*300mm f4 provides an effective crop factor equal to 630mm on APS-C Pentax cameras while providing very accurate autofocus. Works with either SDM lens and in body screw drive focusing lens.
Darryl L.
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500
Browse our FAQ
1.4 times
4 elements in 3 groups
Lens soft case DA70mm Limited (included)
Approx. 65mmx20mm (2.6inchx0.8inch)
Approx. 126g/4.4oz
Case, Body Mount Cap, Lens Mount Cap
HD Coating, Weather Resistant, Dustproof Construction (AW)
027075273313
The Pentax K3 is great for portrait and fashion photography, photographing star trails and other astronomy, and photographing wildlife and extreme sports. Here's what you need to accomplish each of these photographic tasks.
For any questions about compatibility with this product, call us at 800-223-2500 or you can email us any time.
Reach Out and Touch Someone
By Darryl L.
Must have when shooting wildlife with a Pentax DSLR. When use with the DA* 300mm f4 it provides an effective 420mm at f5.6. The actual 420mm focal length of the combination converter and DA*300mm f4 provides an effective crop factor equal to 630mm on APS-C Pentax cameras while providing very accurate autofocus. Works with either SDM lens and in body screw drive focusing lens.
Only game in town for Pentax APS-C users
By David M.
Optimized for today's digital lenses, this converter is the only one that will give all DA lenses their full function on Pentax cameras.
Enhance your photographic capabilities with the HD PENTAX-DA AF 1.4x Rear Converter AW, a high-quality accessory designed for K-Mount lenses. This innovative converter is engineered to expand your field of view by 1.4 times, effectively transforming your lens into a longer focal length while maintaining a compact and lightweight profile.
Constructed with a weather-resistant build, the HD PENTAX-DA AF 1.4x Rear Converter AW ensures that your photography sessions remain uninterrupted, even in challenging weather conditions. It's the perfect companion for outdoor photographers who encounter rain, mist, or splashing water, providing a durable solution for capturing stunning images in less than ideal environments.
The converter is treated with PENTAX's exclusive HD coating, which enhances light transmittance and reduces reflectance compared to traditional multi-layer coatings. This advanced technology delivers exceptionally sharp and clear images, effectively minimizing flare and ghosting, even when shooting in backlit situations.
Despite its powerful magnification capabilities, the HD PENTAX-DA AF 1.4x Rear Converter AW boasts an extremely small form factor, measuring a mere 20 millimeters in length. This versatile and portable design does not compromise on image quality, allowing photographers to capture larger, more detailed subjects even in close-up shots, while retaining the lens's minimum focusing distance.
Auto Focus and Auto Aperture functionality are seamlessly preserved with the use of this rear converter, ensuring that your Pentax DSLR continues to operate efficiently. The converter is compatible with both camera-driven and lens-driven AF systems, including SDM- and DC-series lenses, making it a convenient choice for those invested in the Pentax ecosystem.
Please note that when using the HD PENTAX-DA AF 1.4x Rear Converter AW, the maximum aperture of your lens will decrease by one stop. For optimal performance, ensure that your camera's firmware is updated to the latest version. Compatible camera bodies include the 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 functionality is supported with PENTAX lenses that have a maximum aperture of f/4 or brighter.
In summary, the HD PENTAX-DA AF 1.4x Rear Converter AW is a durable, versatile, and innovative solution for photographers looking to extend the reach of their K-Mount lenses without sacrificing image quality or convenience. Whether you're capturing distant landscapes or intimate wildlife shots, this rear converter is an essential tool for achieving professional-grade results.