HD PENTAX DA AF 1.4X AW Rear Converter


Smeggypants

Link Posted 01/04/2014 - 13:15
Darkmunk wrote:
Incidentally, here's an example of using a cheap 2x convertor versus cropping a 300*.
Mirror up, tripod, manual focus, live view x 2, no sharpening.
300 cropped to 800px


300 with 2x convertor, cropped to 800px


This image sharpens-up really nicely with 50/1/0 USM

There's a lot more difference between those two examples as their between the K-5II and the K-5IIs.

but in all practical terms does anyone really need to discern the latin inscription on the royal crest. Like you say they'll sharpen up no probs in PP.

don't we just love pixel peeping
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

Mike-P

Link Posted 04/04/2014 - 22:38
Couple of test shots with the FA* 250-600mm f5.6 and 1.4x HD teleconverter.

840mm .. no cropping. Bit of processing on the Ryanair plane, nothing on the street light (my usual test subject with a new lens)






No equipment list here but thanks for taking an interest. My Flickr
Last Edited by Mike-P on 04/04/2014 - 22:40

Darkmunk

Link Posted 05/04/2014 - 10:56
Blimey, that looks like a cracking combination. The bokeh on the tree branches looks a bit odd, but I doubt that's anything to do with the convertor.
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Mike-P

Link Posted 08/04/2014 - 19:45
Few taken with the 60-250mm and 1.4x. All at 350mm, It was a dark wet dingy day so they are a bit dull (in more ways than one)









No equipment list here but thanks for taking an interest. My Flickr

Blythman

Link Posted 08/04/2014 - 20:40
Best I've seen so far on here Mike
Alan


PPG
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Smeggypants

Link Posted 08/04/2014 - 22:18
Love the Duck in flight pic
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

gwing

Link Posted 08/04/2014 - 22:57
Very nice Mike, all three.

It ought to be the least standout shot of the three, but my eyes keep getting drawn back to the horse.

Daronl

Link Posted 08/04/2014 - 23:49
Already returned mine, works fine on primes but not on zooms where it needs some nifty double pressing of the shutter button to get a two stage focus on zooms.

Optically inseparable from Tamron but like all of them degrades the image and suffers CA too.

Tamron is smaller but identical on performance even though it is 15 years old. Very disappointed





ChrisA wrote:
percy wrote:
link

$600

I'm surprised. I was expecting more of a price-gouge than that.

If it's really, really good optically, that's not too bad, given how ridiculous lens prices have become.


Daronl

JohnX

Link Posted 09/04/2014 - 08:11
Daronl wrote:
Already returned mine, works fine on primes but not on zooms where it needs some nifty double pressing of the shutter button to get a two stage focus on zooms.

Optically inseparable from Tamron but like all of them degrades the image and suffers CA too.

Interesting comments. I've been watching with interest and see an increasing number of people producing great results with this TC.

Mike-P

Link Posted 09/04/2014 - 09:33
Daronl wrote:
Already returned mine, works fine on primes but not on zooms where it needs some nifty double pressing of the shutter button to get a two stage focus on zooms.

Optically inseparable from Tamron but like all of them degrades the image and suffers CA too.

Tamron is smaller but identical on performance even though it is 15 years old. Very disappointed

Mine doesn't need 2 presses of the rear focus button on the 60-250mm or Sigma 100-300mm f4 but it does on occasions with the 50-135mm. Although not a million miles away optically from the Tamron (and 1.5x Kenko) there is (imo) a slight increase in quality with the Pentax but the WR and correct exif/focal length (for IS) reporting is certainly worth the extra for me.

Saying that my first one went back as I didn't think it was worth 380 (I still don't) but I managed to grab a new one off Ebay for a substantial discount.
No equipment list here but thanks for taking an interest. My Flickr

Offertonhatter

Link Posted 09/04/2014 - 20:28
Mine is on its way, I should get it tomorrow from SRS. Looking forward to using it.
Some Cameras

Mike-P

Link Posted 11/04/2014 - 14:56
So far I have to say I am pretty pleased with the converter on the 60-250mm as long as the subject is stationary. If you need to use tracking in any way (K-5II) then forget it as it's even worse than normal (and that's saying something).
No equipment list here but thanks for taking an interest. My Flickr
Last Edited by Mike-P on 11/04/2014 - 14:57

Offertonhatter

Link Posted 12/04/2014 - 21:10
Initial thoughts on the 1.4x converter

On the DA*300 I have found that occasionally it won't trigger, The focus confirmation is there, but it seems it does not want to know that. I think I will give the contacts of the 300 a quick clean before I consider it a problem. Mind you, like I say, it is occasional.

DA*50-135 - Lovely indeed. Nothing to complain about at all

Sigma 170-500 - Fast IQ is limited be the lens, not the converter. Still, it seems pretty good, possibly better than without the converter. I might give this lens a new lease of life (still not in the IQ league of the 300 with or without the converter)

FA50 F1.4 - Very strange indeed. Wide open it registers F2.4 on the body, it should read F2. IQ could be called dreamy at best. Downright soft at worst. Still, it could be used very well for portraits. So much so I have ordered a DA50 F1.8 which is very much like the F1.7 wide open, ie contrasty. Stopped down, sharp as a tack as usual.

10-17mm Fisheye - Well you just have to give it a go, don't you Curves are dramatically reduced. Still, it works, unlike the 21mm (which I have used on it) due to the rear element not moving further out which will hit the converter element. It is only a couple of mm's but enough. Do NOT use the 21mm with the converter, all.

Overall though, the converter is excellent, the IQ is akin to a lens without (apart from the FA50), and it opens up horizons with just about all your lenses.

Just remember this one thing:-
Check the lens you are considering using it with. If the rear element stays flush when you zoom and focus, or just focus on primes, you will be fine. If it starts sticking out when you use it (use the rings to check) then do not under any circumstances use it with the converter as it will damage it.
Some Cameras

beakynet

Link Posted 28/04/2014 - 13:36
Has anyone tried the converter with the Sigma 120-400 HSM lens? I have the Kenro 1.5 which works with the lens (in HSM) but IQ is worse than cropping and enlarging!
Bodies: K5IIs, K7, MZ5n, LX, MV
Lenses: DA*16-50, DA18-55WR, DA18-135, DAL35, M50 F2, A50 f1.4, FA50 f1.4, DA*50-135, DA55-300, Tamron 70-300, DFA 100 WR Macro, M135 f3.5, Sigma 120-400 APO DG HSM, Tokina 500 f8.0
Flash: Metz 58, Metz 48
Accessories: BG4, Pentax right angle finder, Pentax mirror adaptor lens, O-ME53 Viewfinder Loupe
Auto 110 System: Auto 110, Winder, 18mm, 24mm, 50mm, 70mm, 20-40mm, AF100P, 1.7x telecon

Mike-P

Link Posted 28/04/2014 - 14:09
It won't work correctly with any HSM lens but to be honest I wouldn't be using a converter on any of the big Sigma lenses as they are just too slow.

Chaffinch with the DA* 300mm and 1.4x


Female Chaffinch by Mike.Pursey, on Flickr
No equipment list here but thanks for taking an interest. My Flickr
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