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03-23-2009, 02:54 PM   #1
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Have someone compared DA 10-17 and DA 12-24?

I have DA 12-24mm and I want to buy DA 10-17mm fisheye.

But I wonder how the FOV are when you see pictures taken at the same location(on a tripod)??
DA 12-24mm at 12mm, 14mm and 17mm
DA 10-17mm at 12mm, 14mm and 17mm

How much difference are there? How much wider is the fisheye at the same focal lenght?

03-23-2009, 03:34 PM   #2
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Don't know the numbers, but having had the 10-17 and now having the 12-24, I can tell you "A whole heck of a lot wider" ;-)


They really are mutually exclusive lenses, so one will not be a good replacement for the other. The only reason I let go of my 10-17 was because I got an even wider 5.6mm circular fisheye (though for my Canon and not my Pentax).
03-23-2009, 03:45 PM   #3
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Fisheye lenses have a wider field of view than rectilinear lenses of the same focal length. As RawheaD pointed out, they are not the same thing at all. I love the 12-24, but won't spend anything on a fisheye. It's just not my bag.
03-23-2009, 04:02 PM   #4
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I took some sample pictures with both lenses a couple of years ago. This is the first one ( Zenfolio | Mtngal's Photos | Miscellaneous ), there's about 4 or 5 shots after this for comparison. The pictures aren't great - they were taken inside a camera store. But they do give you an idea of the different characteristics of the two lenses. I ended up buying the 12-24 a year or two later - while the fisheye looked like it could be great fun, it seemed too expensive for how little I would end up using it. The 12-24 gets used quite often, I've been very happy with it.

03-23-2009, 04:04 PM   #5
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I don't remember where I found these, but here are some DFOV (diagonal field of view) equations I found on the 'net at some point in history:

DFOV on APS-C Sensor
- Rectilinear = 2 * arctan (14.2mm / focal length )
- Equisolid Fisheye = 4 * arcsin (7.1mm / focal length)

(If you want your calculation to be in degrees, make sure you calculator is set to degrees and not radians!)

So . . .

12mm Rectilinear: 100 degrees
24mm Rectilinear: 61 degrees

10mm Fisheye: 180 degrees
17mm Fisheye: 99 degrees

. . . which means the 10-17mm pretty much picks up where the 12-24mm leaves off.

UPDATE: I think I got the equations here:

Field of View - Rectilinear and Fisheye Lenses

I don't have either of these specific lenses, but I do have a 17mm fisheye (Peleng), and it's waaaaay wider than the kit lens at 18mm.
03-23-2009, 04:33 PM   #6
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I have both and will agree that they are very different beasts. For myself the DA 12-24mm is becoming my main landscape lens (replacing the DA 16-45mm) and teh DA 10-17mm is more a special application or "fun" lens.
03-23-2009, 06:11 PM   #7
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Thanks for all your help.

I think that the fisheye lens would be a fun lens to have. Maybe even worth the $433

A question for Canada_Rockies, you have mention in several threads/posts that you have done something to your lenses after you bought them. DoX, Dxo...? What is this? Please explain what this is.
03-23-2009, 06:20 PM   #8
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QuoteOriginally posted by NorthPentax Quote
I have DA 12-24mm and I want to buy DA 10-17mm fisheye.

But I wonder how the FOV are when you see pictures taken at the same location(on a tripod)??
DA 12-24mm at 12mm, 14mm and 17mm
DA 10-17mm at 12mm, 14mm and 17mm

How much difference are there? How much wider is the fisheye at the same focal lenght?
Here ya go....a direct comparison. 10-17@10mm vs 12-24@12mm:

https://www.pentaxforums.com/forums/post-your-photos/53130-wide-angle-church-interior.html

03-24-2009, 09:58 AM   #9
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QuoteOriginally posted by NorthPentax Quote
Thanks for all your help.

I think that the fisheye lens would be a fun lens to have. Maybe even worth the $433

A question for Canada_Rockies, you have mention in several threads/posts that you have done something to your lenses after you bought them. DoX, Dxo...? What is this? Please explain what this is.
Not him, but I can tell you DxO is a RAW processing application. You would use it in place of whatever (Photoshop, Lightroom, Aperture) to process your RAW files.
03-24-2009, 10:50 AM   #10
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DxO explained

QuoteOriginally posted by RawheaD Quote
Not him, but I can tell you DxO is a RAW processing application. You would use it in place of whatever (Photoshop, Lightroom, Aperture) to process your RAW files.
This is he. DxO Labs produce software that recognizes your camera and lens combination and corrects the lens/body flaws that they have tested. I have the K10D and DA 12-24, DA* 16-50 and DA* 50-135 that have been tested and released. Their RAW converter applies distortion, sharpening, vignetting, Chromatic Aberration and Purple Fringe corrections. It makes my very good lenses excellent, so to speak.
03-26-2009, 07:00 PM   #11
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Thanks.

I thought it was a third party repair shop that made adjustment to your lenses.
Is there any difference to your DA*50-135mm pictures?

Too bad they don't have DA 10-17mm fisheye and DA 17-70mm in their library of lenses.
I guess I will buy the Hemi-fisheye plug-in, it looks like a good plug-in and cheap.

I have accepted a counter-offer I got from PD2000. $370USD incl. S&H. DA 10-17mm fisheye will cost me about $433USD incl. taxes.
I will post a thread with comparisons from both DA10-17 and DA12-24.
03-26-2009, 07:17 PM   #12
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I posted side-by-side shots showing the field of view here.

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/37930-da-10-17...-please-2.html
03-27-2009, 01:52 AM   #13
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Great! Just what I was looking for. Thanks, SpecialK.
03-27-2009, 07:22 AM   #14
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QuoteOriginally posted by maxwell1295 Quote
Here ya go....a direct comparison. 10-17@10mm vs 12-24@12mm:

https://www.pentaxforums.com/forums/post-your-photos/53130-wide-angle-church-interior.html
I looked at those vivid shots and posted this on that thread:
I have the 10-17, and a couple other lesser fisheyes; and the 12-24 may be next on my LBA list. All these shots are interesting and show that these are very different lenses, at least at their extremes. IMHO such an interior space just isn't right for the 10-17, at least not so wide. I try to avoid such strongly bent lines at edges. I thus venture into strange rounded and irregular spaces, to brushy landscapes and radial intersections (3 or many more lines converging centrally), and extreme closeups before a flat horizon.

I've read some commentary on rectilinear ultrawide lenses, to the effect that the proper(?) use of such is not to stand back and capture the entirety of vast spaces and vistas, but to delve ever closer to the subject and its context. A constrained opinion, yes, but it's driving my desire for the 12-24. But do I really need it? The 10-17 can approach rectilinearity with minor defishing, with nearly the same FOV; but how do the DOFs differ, and IQ? In our lens review database Pentax Lens Review Database - DA Series Zooms the 10-17 gets a higher rating; and the 12-24 costs MUCH more. Ah, the price vs performance is a quandry...
So, as a non-professional on a blown-out budget, comparing the 10-17 FE's 99-degree FOV at 17mm, vs the 12-24 RL's 100-degree FOV at 12mm, thinking that slight defishing probably levels the results - and considering that I own the first and would have to spend lotsa $$$ for the second - and with the other issues I raised above, I must say, it's not easy justifying such a purchase.
03-27-2009, 08:17 AM   #15
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DA 10-17 FE is an awesome lens! Bought it to have some fun, and am finding that it is much more useful than just fishy silly shots. Truely a gem.

c[_]
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