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Sigma 12-24mm v Samyang 14mm UWA FF lens

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EarthQuake View Drop Down
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Post Options Post Options   Quote EarthQuake Quote  Post ReplyReply Direct Link To This Post Topic: Sigma 12-24mm v Samyang 14mm UWA FF lens
    Posted: 27 November 2012 at 16:54
So I just picked up an A900 and I'm looking to replace my APS-C Tamron 11-18mm lens. My main use for this lens will be architecture, landscapes, and a little real estate(plan to sell our house in the near future). My biggest concern here is really optical quality, I find myself using the 11-18mm at the 11mm setting almost exclusively, so a prime like the 14mm wouldn't be a big convenience issue to me if the optical quality is significantly better. I also don't mind using MF at this focal length.

I like the extra 2mm on the 12-24mm and of course a zoom will be nice to have at times.

I really like the cost of the 14mm, and the build/optics of the Samyang 8mm that I used previously were very good.

So what do you guys think?
 



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coyote1086 View Drop Down
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Post Options Post Options   Quote coyote1086 Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2012 at 18:28
The 12-24 (first version, no HSM) is quite sharp when used at F8-F11, since you have A900 with AF micro adjust, there shouldn't be a problem. When used on my A700, it is sharp as my A700 has a tiny little backfocus. On my A100, it was not as sharp.

I tried the Samyang/Rokinon 14mm very briefly, and I cannot remember what aperture I used, but it was not as sharp on the A700. But please do not take my opinion too seriously as it was not tested properly.

Like you, when I was using the 12-24, I probably only used it at 12mm, if I need longer, I'll always go to my 16-80CZ.
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Sönke Henning View Drop Down
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Post Options Post Options   Quote Sönke Henning Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2012 at 18:57
Can speak only for the 14mm:

- VERY sharp in the middle at all(!) apertures
- sharp in the corners from f5.6 onwards
- almost no flare
- no ca
- found MF no serious problem
- strange distortion, so not the best lens for architecture. But there's some plugin for lightroom and ptlens offers correction, too.
- a bug in the distance-scale. Set it to 2m for infinity focus.
I like it very much.
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Burt View Drop Down
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Post Options Post Options   Quote Burt Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 09:43
I am very glad with the sigma 12-24 on my a900. It is wider than the sigma 10-20mm on my a700.
scharpness is fine all-round and with the LR4 lens correction, transformation can be reduced almost completely.

Downside: lack of filter fitting + sun shade gets in the way when using @12mm
greetings

Bert Vertommen
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trainerKEN View Drop Down
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Post Options Post Options   Quote trainerKEN Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 10:15
I had the Rokinon 14mm f2.8... I had to sell it to help fund a CZ1635. I kinda wish I didn't sell it, because some of my favorite landscapes were taken with this lens + a900, but there's the distortion... see photo below, I even tried fixing it in Lightroom and had a hard time doing so

this photo was BEFORE any attempts on distortion fix. As you can see the log is curved like crazy


English Bay, Vancouver BC/Canada by trainerKEN., on Flickr
a99/a7/a6000/NEX 5N/CZ135/70200G/70400G/FE70200GF4/Σ85mm f1.4/Σ24-70mm f2.8/Σ12-24mm HSM II/Rokinon 24mm Tilt-Shift/Tamron 90mm macro/SEL16F28/SEL1650/SEL55210
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ifreedman View Drop Down
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Post Options Post Options   Quote ifreedman Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 13:35
I have a vivitar 13mm f2.8 -- from what I've heard, it's the same lens (rebadged) as the Samyang 14mm, but somehow vivitar got an extra 1 mm out of it. Price is darned low, and it's a nice lens to use. I like it, but there are times when I wish it were wider.

If it if were me, I'd probably get the Sigma 10-20 4-5.6 or Tamron 10-24mm. I just like having that extra reach, and both are fairly priced for used lenses ($350+). Although the f2.8 of a prime lens is nice (Tokina has a nice, but more expensive 11-16 f2.8). But given the choices you mentioned... if you need F2.8 or depending on the costs, the Samyang would be a good lens for you. But otherwise, I don't think you'll go wrong with Sigma.

Samyang is also supposed to be coming out with a 10mm f2.8 lens. I'm guessing this will be released in the Spring, sometime around March or April. Link I'm guessing it will be attractively priced, although no AF like other Samyangs.

Ian
 



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EarthQuake View Drop Down
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Post Options Post Options   Quote EarthQuake Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 15:34
Thanks guys! I didn't realize the distortion on the 14mm was so heavy, usually a little distortion doesn't bother me but that's a bit extreme.

Looks like I should start saving up for the 12-24mm then! I really do like the idea of 12mm on the A900, and it will still be an UWA on my A580 if I want to use live view, video, etc. Having a fast lens isn't that big of a deal, a lot of my work with this lens will be in good light at low apertures or on a tripod.

ifreedman: All of those lenses are aps-c, I've already got the Tamron 11-18mm but need to replace it with a FF UWA. Also yeah, the Vivitar is the same lens, they just like to play games with the specs for marketing purposes, see: Vivitar "7mm" fisheye.
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ifreedman View Drop Down
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Post Options Post Options   Quote ifreedman Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 15:56
D'oh. I can't believe I missed that FF thing.
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bharnois View Drop Down
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Post Options Post Options   Quote bharnois Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 17:58
You just reminded me! I have my Tammie 14 2.8 that I haven't used since I got my A900. Time for a spin methinks. That sucker is built like a tank. About the only way to filter is use the drop in slot on the mount side.
Just luvin' DYXUM.
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EarthQuake View Drop Down
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Post Options Post Options   Quote EarthQuake Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 18:33
Originally posted by bharnois bharnois wrote:

You just reminded me! I have my Tammie 14 2.8 that I haven't used since I got my A900. Time for a spin methinks. That sucker is built like a tank. About the only way to filter is use the drop in slot on the mount side.


Yeah the filter thing is one of my concerns as well, but it looks like any of the really wide lenses won't allow filters in the traditional sense. Oh well, I don't use filters that often, would be nice to use NDs though.
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gaging View Drop Down
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Post Options Post Options   Quote gaging Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 19:21
Perhaps you should consider a used Tokina AT-X 17 AF 17mm F3.5 or a Tokina AT-X 17 AF PRO 17mm F3.5. With a full frame camera, either one would be the equivalent of an 11.33mm lens on an APS-C camera. I owned one for about a year, but I replaced it with a wider Tokina 11-16mm f/2.8 lens for my APS-C camera.

The Tokina 17mm f/3.5 lenses are sharp, built like a tank, designed for full frame, and they take regular filters. The PRO version is easier to use with filters because the lens hood is removable, but the fixed hood version also works with slightly more work to screw them in. When you can find one of these lenses, they are usually reasonably priced.
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EarthQuake View Drop Down
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Post Options Post Options   Quote EarthQuake Quote  Post ReplyReply Direct Link To This Post Posted: 29 November 2012 at 19:49
Originally posted by gaging gaging wrote:

Perhaps you should consider a used Tokina AT-X 17 AF 17mm F3.5 or a Tokina AT-X 17 AF PRO 17mm F3.5. With a full frame camera, either one would be the equivalent of an 11.33mm lens on an APS-C camera. I owned one for about a year, but I replaced it with a wider Tokina 11-16mm f/2.8 lens for my APS-C camera.

The Tokina 17mm f/3.5 lenses are sharp, built like a tank, designed for full frame, and they take regular filters. The PRO version is easier to use with filters because the lens hood is removable, but the fixed hood version also works with slightly more work to screw them in. When you can find one of these lenses, they are usually reasonably priced.


I have considered it, but if I'm going to buy a new lens I want something significantly wider, I think 14mm is really the minimum for me.
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