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08-26-2015, 12:22 AM   #31
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In the OP you mention a leaning toward the 16-45 but it also has the distortion at the widest point and it has CA as well which is better controlled in the other choices mentioned.
I have the Sigma 8-16 and the Pentax 16-45 and they both get extensive use and work in different contexts. Photoshop has a lens correction for RAW files made with the Sigma 8-16 which works well if needed at the wider angles.

08-26-2015, 01:06 AM   #32
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QuoteOriginally posted by Arjay Bee Quote
In the OP you mention a leaning toward the 16-45 but it also has the distortion at the widest point and it has CA as well which is better controlled in the other choices mentioned.
These days, the DA16-45 CA and distortion are easily corrected either in-camera or in post-processing.
I don't find it a problem - Flickriver: kh1234567890's photos tagged with smcpda1645mmf40edal
08-26-2015, 02:38 AM   #33
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Most landscape shots will end up being shot at f8 due to need to maintain depth of field anyway and the DA 15 limited will be pretty good at that point. Its biggest selling points are its contrast, colors, and flare resistance. The other lenses mentioned in thread will probably have sharper borders at f4 though.

08-26-2015, 09:15 AM   #34
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While the conversation has moved away from the Sigma 10-20 lenses, I thought one misconception from the start of the thread should be cleared up. Sigma has a constant f/3.5 version, and the variable f/4-5.6 version. AFAIK, there is not any such thing as a 10-20 f/3.5-4.5 lens.

08-26-2015, 09:35 AM   #35
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QuoteOriginally posted by Aristophanes Quote
Pretty much all WA are soft wide open. The DA 15 is not really soft at f/4 wide in the centres but t the edges and then not so much.

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.

Also, both the DA 15 and the DA 21 sharpen up substantially with a single 1/3 click to narrow f-stop, or ~1/3. That's all it takes for these sense to go bam! The DA 21 is really an f/4 sharp and the DA 15 is really an f/4.5.

The best zoom not mentioned from the OP is probably the Pentax DA 12-24. I'd rate that above all the rest in the list.



I don't see any so-called soft corners in any of Sandy Hancock's pictures ?
08-26-2015, 09:44 AM   #36
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QuoteOriginally posted by Sandy Hancock Quote
Why a zoom? I agree with Digitalis; the tiny DA15 is a pretty compelling ultra-wide package.
It allows you more compositional freedom which I think is a big plus for landscapes.

That said, the prime may teach you to look with "15mm eyes", in which case you may not need that freedom so much.
09-10-2015, 07:27 AM   #37
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How is the Pentax 5-15mm 2.8 ?
09-10-2015, 09:07 AM   #38
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QuoteOriginally posted by kentster Quote
How is the Pentax 5-15mm 2.8 ?
That lens is designed for the Pentax Q, and is utterly incapable of being used on an APS-C DSLR.

09-10-2015, 10:35 AM   #39
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QuoteOriginally posted by kentster Quote
How is the Pentax 5-15mm 2.8 ?
QuoteOriginally posted by Digitalis Quote
That lens is designed for the Pentax Q, and is utterly incapable of being used on an APS-C DSLR.
But for what it is worth - people rave over it on the Q/Q7/QS1 etc. On the latest Q sensor (Q7/QS1) it is an equivalent to a 23-69 (24-70) on 35mm or a 15-45 on APSC.
09-10-2015, 10:39 AM   #40
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QuoteOriginally posted by Digitalis Quote
That lens is designed for the Pentax Q, and is utterly incapable of being used on an APS-C DSLR.
Cool..thank you. I should have looked closer on the eBay description before i posted..lol

How does the 15 work for you for night shoots? It's a f4 correct ?
09-10-2015, 10:44 AM   #41
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QuoteOriginally posted by kentster Quote
Cool..thank you. I should have looked closer on the eBay description before i posted..lol

How does the 15 work for you for night shoots? It's a f4 correct ?
I enjoy mine for night shots but with a tripod and static subjects or subjects that you want to blur.

09-12-2015, 08:05 AM   #42
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QuoteOriginally posted by kentster Quote
Cool..thank you. I should have looked closer on the eBay description before i posted..lol

How does the 15 work for you for night shoots? It's a f4 correct ?
A few picture taken after fireworks:

DA15, f/4, 1/10s, 2500isos. Softness and vigneting added on borders in post to fade away the surroundings and draw more attention to the subject


DA15, f/4, 1/13s, 3200isos.


DA15, f/4, 1/5s, 6400iso, polariser filter added to try to remove some of the reflections


Not too bad for a slow lense, isn't it?
09-12-2015, 11:02 PM   #43
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where can one get an older SMC 15?
09-13-2015, 02:57 AM   #44
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QuoteOriginally posted by kentster Quote
where can one get an older SMC 15?
On the second hand market.
09-13-2015, 04:50 AM   #45
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I'm pretty much happy with my trusty ole Sigma 12-24.

https://www.pentaxforums.com/forums/12-post-your-photos/189608-cityscape-shadows-bridge.html

Much less distortion than my 8-16 at 12mm. And it's a FF.
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