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08-23-2015, 07:50 AM   #16
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Another vote for the Sigma 8-16 and 10-17 fisheye.

Pentax DA 10-17






SIgma 8-16









08-23-2015, 12:21 PM   #17
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QuoteOriginally posted by ronuser Quote
OK...It's a big clunker, but I love the Sigma 24-70 2.8 (macro). I have the non HSM version. I'm looking for a wider zoom ....

Sigma 10-20 f/3.5
Sigma 10-20 f3.5-4.5
Tamron 10-24 f/3.5-4.5
Sigma 17-35 f/2.8-4 (I'm leaning towards this)
Pentax 16-45 f/4 (I'm leaning towards this as well)

Thoughts.....? Not interested in the Pentax 10-17
I own the Sigma 10-20 f3.5-4.5 and the Pentax 16-45. They are both reasonably sharp wide open and much sharper when stopped down to f8 or so. In practical applications, the Sigma is considerably wider on the wide end than the Pentax.

The issue I have with most of these lenses is the sharpness at infinity. I shot the Sigma for a studio product session that called for extreme closeup and very distorted images. The results are stunning at f10 or so. I have also shot some landscape work and the lens seems to be soft for far away objects even when stopped down.

I keep thinking that it is my imagination or unreasonable expectations of the lens but the Sigma is softer for infinity applications. For normal viewing sizes and small to mid-size prints it may be ok.
08-24-2015, 08:45 AM   #18
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QuoteOriginally posted by sholtzma Quote
Why not the Pentax (or Sigma) 12-24mm?
Relatively new to the forum, so I may have posted in the wrong place. Anyway, these two are a bit expensive. Can't find a good price for them anywhere.

---------- Post added 08-24-15 at 08:49 AM ----------

QuoteOriginally posted by UncleVanya Quote
Have you read this series?
Sigma 10-20mm F3.5 vs F4.0-5.6 Comparative Review - Hands-on Reviews | PentaxForums.com

In the linked article there are links to earlier comparisons as well.
The Pentax 12-24 gets some pretty good reviews. Wish I could find a reasonably priced one. The 10-20 f/3.5 Sigma is probably what I'll wind up with. The projected full frame will take DA lenses, yes?
08-24-2015, 09:12 AM - 1 Like   #19
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QuoteOriginally posted by ronuser Quote
Relatively new to the forum, so I may have posted in the wrong place. Anyway, these two are a bit expensive. Can't find a good price for them anywhere.

---------- Post added 08-24-15 at 08:49 AM ----------


The Pentax 12-24 gets some pretty good reviews. Wish I could find a reasonably priced one. The 10-20 f/3.5 Sigma is probably what I'll wind up with. The projected full frame will take DA lenses, yes?
It is supposed to support a cropped mode. In that mode da lenses should work. APS image field of view however. Some may support full size view but unsure.

08-24-2015, 02:51 PM   #20
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In "non-cropped mode", the upper part of the range of the 12-24 might work for FF but not the wider end of the range. I am expecting to have to buy the new UWA zoom, assuming I pick up a FF Pentax body.
08-24-2015, 03:27 PM   #21
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If you want it for FF go for this.... how can you lose?

https://lensandshutter.com/products/pentax-faj-18-35-mm-bd
08-24-2015, 04:53 PM   #22
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As I go through all the comparisons and thoughts, I think one thing has become clear to me....speed. I do a lot of low light shoots for restaurant branding and 2.8 to f/4 max is where it's at and whatever wide (doesn't have to be super wide) is sharp at the widest aperture wins.
08-24-2015, 05:03 PM   #23
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QuoteOriginally posted by Digitalis Quote
Only out in the corners, the center of the image is rendered sharply even at f/4. The downfall of the DA15 is that the corners never get as sharp as the center which is a discrepancy that attracts attention to the issue. And even then you have to be looking very closely to spot it at apertures f/8 and above.



DA15mm f/4 ASPH

Though you will never find any manufacturer that makes a lens as compact,well built or with the superlative flare tolerance of the DA15mm f/4.



The Pentax 10-17 is a fisheye, the sigma 8-16mm isn't. Yes, at 8mm distortion is visually noticeable, at the 11~14mm focal length range distortion is minimal, so much so that it is probably less than any lens at the same focal length on your list.


Sigma 8-16mm f/4.5-5.6 @ 11mm



Love the picture with the blurred tail lights!! Is that one pic or a multi exposure creation?

08-24-2015, 07:34 PM - 1 Like   #24
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QuoteOriginally posted by kentster Quote
Love the picture with the blurred tail lights!! Is that one pic or a multi exposure creation?
It was a single 30s exposure, the flare resistance of the DA15 maintained a high degree of contrast in a situation where other lenses would have suffered from lowered contrast.
08-25-2015, 10:11 AM   #25
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QuoteOriginally posted by Aristophanes Quote
People forget WA shooting is NOT about the edges. It's about the diagonals where the entire perspective draws the eye to the centre anyway. That's just how WA lenses work regardless of brand. Look at every shot above this post to see the effect



08-25-2015, 10:41 AM   #26
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QuoteOriginally posted by kh1234567890 Quote



Making my point.
08-25-2015, 10:50 AM   #27
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QuoteOriginally posted by Aristophanes Quote
Making my point.
I would have found it hard to shoot that unremarkable spontaneous handheld snap with the DA15. Even if the thing had managed to lock focus on the plane, the edges and corners would have been hopelessly fuzzy at f4.
08-25-2015, 11:10 AM   #28
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Edges are pretty important to me. One thing I don't care for about most aps-c wide angle lenses is the stretchy/blurry thing that happens at the corners and edges most of the time. It would be nice to have the upcoming FF just to be able to use a 20 mm lens as an uwa.
The DA14 is pretty underrated imo. I have one for sale in the marketplace, but it's been winning me over lately....

Here's some quick examples full scene and 100% crops no sharpening:

( yeah, i need to dust )

Last edited by ChatMechant; 10-07-2016 at 09:11 AM.
08-25-2015, 07:07 PM - 2 Likes   #29
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QuoteOriginally posted by kh1234567890 Quote
I would have found it hard to shoot that unremarkable spontaneous handheld snap with the DA15. Even if the thing had managed to lock focus on the plane, the edges and corners would have been hopelessly fuzzy at f4.
Please do not confuse the DA15mm f4 limited with a lensbaby.
08-25-2015, 08:01 PM   #30
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QuoteOriginally posted by Digitalis Quote
Please do not confuse the DA15mm f4 limited with a lensbaby.
Thank you for saying that. I think people get the wrong idea about the DA 15. It is stunningly sharp in the center so much so that the fade away is more noticed than otherwise. But gee wiz it isn't covered in vaseline...
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