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 Multi-Layer Lens Coating
- Weather-Resistant and Dustproof Design
- Increases Focal Length by 1.4x
- Reduces Lens Aperture by 1 f/Stop
Pentax 1.4x AW AF Rear Converter Overview
- 2PENTAX HD Lens Coating
- 41.4x Magnification in a Compact Form Factor
- 5Auto Focus and Aperture Functionality
- 6Compatible Lenses
- 7Compatible Cameras
- 8Bundled Accessories
Pentax 1.4x AW AF Rear Converter Specs
|Optical Design||4 Elements in 3 Groups|
|Light Loss||1 Stop|
|Length||0.8" / 20 mm|
|Diameter||2.6" / 65 mm|
|Weight||4.4 oz / 126 g|
|Package Weight||0.56 lb|
|Box Dimensions (LxWxH)||4.05 x 3.7 x 3.7"|
Pentax 1.4x AW AF Rear Converter Reviews
On the right lens ...
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.
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
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
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
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.
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
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!
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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