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The Pentax HD DA AF 1.4x AW Rear Converter is a extender lens for FF and APS-C, manufactured from 2014. The average price, when it has been added to the JuzaPhoto database, is 399 €;
22 users have given it an average vote of 8.5 out of 10.
MOUNT
This lens is available with the following mounts:
Pentax: this lens is compatible with reflex fullframe and APS-C Pentax.
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Reviews
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The following opinions have been automatically translated with Google Translate.
Cons:It practically has none. does his job very well
Opinion:Excellent multiplier, maintains autofocus speed with very slight delay, qualitatively it loses almost nothing, indeed the 150-450 even improves. I have 2 ...., since one is now fixed on 150-450, the other I use it with 300 f / 4.5, the old blender that still has an enviable yield. Superrecommended. It costs less than the competition. Too bad they never did a 2x autofocus....
Pros:Robust construction, optical quality, is tropicalized
Cons:Not compatible with full frame, price from new, tends to unbalance the camera
Opinion:Bought second-hand, after some generic tests for the fine adjustment of the autofocus, I immediately imposed the "baptism of fire" at the Monza racetrack, and I must say that I was very impressed. Used on the 60-250 mm f/4 and 300 mm f/4 and grafted on the K3-II, I did not detect substantial decreases in sharpness of both lenses, and a near total absence of chromatic aberrations, except on extreme contrasts. More complex is the talk of autofocus. Taking note of the note slowness of the first generation of the SDM, with the addition of the multiplier does not slow down much, but obviously struggles a little more to keep the subjects in focus fast moving, both for the obvious decrease in brightness of the lens (1 stop), and for the equally obvious decrease in the depth of field, so it takes a little more expertise. Stretching the optics to which it is paired, it tends to unbalance forward the whole set, especially with the 60-250 zoom, which at maximum focal becomes challenging enough to wield, and it is highly advisable at least the monopod. Attention, it is not compatible with the full frame format of the K1. If you use paired with 200 f/2.8 and 300 f/4 you must set the APS-C cropping mode, otherwise it vignettes heavily. Anyway it's a well-made accessory. Having bought it used I can not criticize the price, but from new it should cost about fifty euros less to align with the most qualified competition. Full rating 8
Opinion:Purchased in 2014, the use of the shed on the 300 / f4. I really needed it, so I brought the focus to 420 mm. I would have preferred that Pentax did a 2x, but you can not have everything in life. The first time I put on my k20d with 300 / f4 I was shocked. All made shots were overexposed. I immediately thought of the rip-off, very high cost of 1.4x and a lack of results I expected. usually shot with iris mode, I started to do various experiments until I realized that its use was linked to under-exposure by one stop. It is now a year and a half that I use with great results. My photos in the blog can prove.
Pros:Construction of excellent workmanship and materials.
Cons:Price a bit 'high
Opinion:I purchased it for use with the 60-250mm. Before using it I did the firmware upgrade as suggested by Pentax and sharpness seems buona.rnL'ho also tried the 70mm f / 2.4 fixed that maintains excellent nitidezza.rnVolevo add that you can also adjust the duplicator the fine focus, which I did with both 70mm and with the 60-250mm and the adjustment is memorized for each objective that is coupled to this multiplier. So I think the Pentax has done a great job. Especially considering the fact that for autofocus is provided for both the operation with the engine optics or through the PTO of the reflex. The camera automatically recognizes and selects the AF faster depending on the perspective utilizzata.rnNota painful price that I think is higher by at least 50 euro to the concorrenza.rn
user2112
sent on January 15, 2015
Pros:I have not found
Cons:yield very little, chromatic aberrations, slowing AF
Opinion:bought and sold in a few days. Coupled with Pentax DA * 300/4 the quality of the shots is obtained embarrassing, both TA that closing stop of 1-2; AF slows noticeably becoming very inaccurate in light conditions good / excellent. Introduces heavy chromatic aberrations. I would not complain of the price ... if only it had been used.
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The following opinions have been automatically translated with Google Translate.
JuzaPhoto contains affiliate links from Amazon and Ebay and JuzaPhoto earn a commission in case of purchase through affiliate links.
