[virusn3t]

My goal with the lens is low light photography, even if i could make it work at f4 cause vignetting the "not sharp at close focus" is a very big dissapointment, im going to wait for the Samyang 20mm, if the results are similar, maybe ill gonna try my luck with the voigtlander (if still available)

[Na Horuk]

Different optical designs can be optimized for different things, even if they have similar Focal length or Aperture. So its great that we have a lot of choice - you can choose one lens for astrophoto, one for closeups, one for landscapes, and so on. Laowa 15mm for macro, Irix 15mm for general landscapes, Samyang 14mm for astrophoto and wide open aperture

[Interspieder]

Different optical designs can be optimized for different things, even if they have similar Focal length or Aperture. So its great that we have a lot of choice - you can choose one lens for astrophoto, one for closeups, one for landscapes, and so on. Laowa 15mm for macro, Irix 15mm for general landscapes, Samyang 14mm for astrophoto and wide open aperture

Yep, it seems like the Irix is one of many specialists out there

[FantasticMrFox]

So: The Irix is as sharp as the Samyang- when you stop it down to its peak and look at the Samyang wide open. For me, that doesn't mean they are equal in resolution!

That is if you are quoting selectively. You missed this bit about edge sharpness on FF ...

The results of the Samyang were a tiny little bit better near the maximum relative aperture but on stopping down the Irix manages to defeat it.

... and this general conclusion:

To sum up: while looking at the small front element of the Irix I doubted whether that lens would manage to beat the excellent and huge Samyang 2.8/14 when it comes to resolution. The results it got in our test were a very nice surprise, though. The Irix performs better on the edge of the APS-C/DX sensor than I expected and the further away from your target you go, the more the resolution increases. I do not hesitate to say that, at working distances typical for this kind of instrument, the lens is able to generate outstanding resolution values.

Furthermore you can look at the flares, they stay there even when stopped down to F8. The lenshood doesn't help at all. So you can't make any landscape pictures with the sun in it, or the sun at the side of yours.

And how is the Samyang doing on that front? Not that great.

Sure, the distortion is smaller, CA aren't that much of a problem, but those are things which can be easily corrected afterwards.

The Samyang is famous for its funny moustache distortion which actually isn't easy to correct.

And sure, Irix features are much better, but i said if you compare only the optics of the Samyang to the Irix, the Samyang wins.

To me it still looks like a draw.

[Paul the Sunman]

The Review is out.

Irix 15 mm f/2.4 Blackstone review - Introduction - LensTip.com

Well, for me the lens is not worth it. I mean, sure, weather sealing, focus lock, etc. are nice gimmicks, but if the optics are that bad in comparison to the Samyang, nope, i'll take the Samyang instead.

If weighing up "monstrous distortion" (Samyang; "huge catastrophe") against "monstrous vignetting" (Irix), I'll opt for the vignetting. It's much easier to correct.

My reading of the Lenstip review sees Irix ahead on balance.

[repaap]

My reading of Irix review also says that Irix is better. If only flare would be better it would smash sammy. Hands down.
That is on FF.
On APS-C sammy is better even WO If you look only sharpness wise. And money spend. That said on APS-C da15 limited is better...

I'm not 100% convinced thou...maybe I'll buy just 12 FE and one really good 18/20 mm.lens instead...or wait for what pentax will offer next year...sammy will have to do untill then.

[Interspieder]

Sorry, but maybe my english skills are not good enough to read an english review. Where do you guys see that the Irix is better than the Samyang?

[MJKoski]

About the Samyang connection...

"Samyang wakes up all of a sudden and launches a Premium line, with contacts. A 2.4/14 lens will be launched as one of the first models. A coincidence? I don’t think so…"

From the review

[Nicolas06]

If weighing up "monstrous distortion" (Samyang; "huge catastrophe") against "monstrous vignetting" (Irix), I'll opt for the vignetting. It's much easier to correct.

My reading of the Lenstip review sees Irix ahead on balance.

Quite hopefully for a lens that significantly more expensive and modern. Samyang 14mm is a steal

[awscreo]

Seem some reviews on YouTube, pretty positive. Also there's a Flickr group dedicated to the lens (search "irix"), results there are very good, so I think it's still a good buy, even with Sy14 2.8 in mind. It shows a lot less distortion for sure, plus wr is a good feat

[Nicolas06]

Seem some reviews on YouTube, pretty positive. Also there's a Flickr group dedicated to the lens (search "irix"), results there are very good, so I think it's still a good buy, even with Sy14 2.8 in mind. It shows a lot let distortion for sure, plus wr is a good feat

Yeap this is all about what you are after Price/Perf compromize.

[D1N0]

You can attach them to the K-1 over at Camerasize.com Compact Camera Meter

[Simen1]

You can attach them to the K-1 over at Camerasize.com Compact Camera Meter

I noticed an annoying copy paste image error: The Samyang 14mm and hood are viewed from the side, when looking at the camera from the top.

[Mistral75]

Going wide: Irix 15mm F2.4 sample gallery: Digital Photography Review

[Paul the Sunman]

Going wide: Irix 15mm F2.4 sample gallery: Digital Photography Review

I've never seen flare like that before! Wow, keep the sun out of your FoV.

Otherwise, it looks really good for architecture. And the vignetting isn't as bad as the Lenstip review would suggest. It looks like a very interesting flawed tool for a photographer who knows what they are doing.