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12-16-2013, 02:46 PM   #1066
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QuoteOriginally posted by richard balonglong Quote
One question...
Does this 20-40mm lens covers the FF image circle?
When I see the exit pupil of the lens I'm quite sure it doesn't cover the FF image circle

12-16-2013, 04:51 PM   #1067
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QuoteOriginally posted by goubejp Quote
When I see the exit pupil of the lens I'm quite sure it doesn't cover the FF image circle
Have you seen the exit pupil of DA 40mm Limited? How about the M 40mm?

I agree with your conclusion but not your methodology.
12-16-2013, 05:05 PM   #1068
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QuoteOriginally posted by Fototim Quote
The calf is present in the 20-40 picture. That proves the 21 mm to be a inferior lens


;-)

A Calf ? I wouldn't like to try milking it

https://www.pentaxforums.com/forums/16-pentax-news-rumors/241156-da-limited-2...ml#post2612114 #1047
12-16-2013, 06:36 PM   #1069
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QuoteOriginally posted by steve1307 Quote
A Calf ? I wouldn't like to try milking it
Usually it is the calf that does the milking of the cow. I'm not a dog breed expert but that "calf" in the 20-40 shot looks more like a Labrador cross than a Charolais cross.

12-17-2013, 02:04 AM   #1070
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Please stop talking Charolais, I'm already starving
12-17-2013, 03:15 AM   #1071
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Hehe. I'd say this makes it a matter of taste.
01-06-2014, 12:46 AM   #1072
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The PF review is now available here :
HD Pentax-DA 20-40mm Limited - Conclusion - PentaxForums.com

I don't really share the point re. AF speed, and i found that DA20-40mm's AF speed and accuracy were identical as on DA18-135WR, and remarquably more silent.

On the other hand, i don't find the measured lack of lens resolution at widest apertures to be a problem for classical use, even with K-3.
+ I would have given a special "plus" for the really amazing ergonomy and "pleasure to use" of this lens (well balanced, ideal dimensions for a zoom with excellent rings, much lighter than body - which isn't for example the case of FA 31 Ltd, ...), actually unique imho in the Pentax lineup.
01-06-2014, 12:58 AM   #1073
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QuoteOriginally posted by Zygonyx Quote
Do you agree with the conclusion regarding sharpness?

01-06-2014, 01:05 AM   #1074
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Not really, or we don't have the same standards - look at these pictures incl. crops taken wide open @ 20 and 40mm with K-3 :

Flickr Search: DA20-40mm PO

Still, better results in the wide end.
01-06-2014, 01:25 AM   #1075
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How about the ''at 40mm only F8 and smaller are acceptedly sharp"?
01-06-2014, 02:39 AM   #1076
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QuoteOriginally posted by wed7 Quote
How about the ''at 40mm only F8 and smaller are acceptedly sharp"?
Yes, because sharpness is the only important part. Not that its a metal lens in a world of plastic, that it is a zoom lens with DoF scales, that it is WR, that it has DC AF motor plus QS, that it has high max magnification and low distortion, low CA and good HD coatings, that it has beautiful rendering and bokeh due to rounded aperture blades. Right.

Not to mention that sharpness is something that can be really affected if you shoot raw and post process. I'm sure once lens profiles exist for this lens and people get than hang of it, its "low sharpness" will no longer be a concern. Remember that the test shots are OoC jpegs, which can suffer from excessive auto-NR, saturation drowning detail, low sharpening algorithms, etc
01-06-2014, 03:31 AM   #1077
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Well, it is a nice looking, well-built lens. That still remains true.

For the rest, apart from its build - as an owner of the DA 18-135 WR I find very little compelling about the DA 20-40.
01-06-2014, 07:46 AM   #1078
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QuoteOriginally posted by Gray Quote
Well, it is a nice looking, well-built lens. That still remains true.

For the rest, apart from its build - as an owner of the DA 18-135 WR I find very little compelling about the DA 20-40.
I had a good copy of DA 18-135 WR (sold together with one of my K-5) and agree that's a fantastic lens.
Nevertheless the 20-40 brings you a litle more light and some interesting flare resistance/nice bokeh.
It all depends what you want to priorise.
01-06-2014, 08:56 PM   #1079
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QuoteOriginally posted by Na Horuk Quote
Yes, because sharpness is the only important part. Not that its a metal lens in a world of plastic, that it is a zoom lens with DoF scales, that it is WR, that it has DC AF motor plus QS, that it has high max magnification and low distortion, low CA and good HD coatings, that it has beautiful rendering and bokeh due to rounded aperture blades. Right.

Not to mention that sharpness is something that can be really affected if you shoot raw and post process. I'm sure once lens profiles exist for this lens and people get than hang of it, its "low sharpness" will no longer be a concern. Remember that the test shots are OoC jpegs, which can suffer from excessive auto-NR, saturation drowning detail, low sharpening algorithms, etc
I agree, sharpness is overrated....
High price, inconsistent results amongst different samples, slow aperture and very limited zoom are much bigger factors than sharpness.
01-07-2014, 05:25 AM   #1080
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Sharpness is overrated if it's considered the be all and all, but I think adequate sharpness prerequisite to call a lens "good", unless the lens has a special purpose like Jupiter 9 or FA soft.

A lens of this price range should be at least as sharp as its rivals, but the reviews really disappoint tbh.

I was one of the proponents of this lens but after reading the reviews, I will consider this lens not a good buy, until I see what this lens can do in the right hands.
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