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The Irix 11mm f/4.0 is a wide-angle lens for FF and APS-C, manufactured from 2017. The focus is done by Manual Focus, it does not have image stabilization. The average price, when it has been added to the JuzaPhoto database, is 471 €;
11 users have given it an average vote of 8.5 out of 10.
MOUNT
This lens is available with the following mounts:
Canon EF: this lens is compatible with reflex fullframe and APS-C Canon EF.
Nikon F: this lens is compatible with reflex fullframe and APS-C Nikon.
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The following opinions have been automatically translated with Google Translate.
Pros:Width of field, excellent sharpness in the center and little distortion, aberrations and distortions correctable without major problems, value for money.
Cons:Bulky, heavy, mounts rear filters and only of the manufacturer, suffers from flare
Opinion:I took the Blackstone version, although heavy to carry can not miss in my bag. With its 11 mm wide angle and not fisheye allows you to take home the shot even in special situations. The fact of being a manual lens is an advantage in night photos where set to infinity (which is feasible even in the dark as the ring takes a shot when it arrives at the exact point) without "wasting" time with the autofocus. It has often happened to me where to shoot on the fly and maybe with another perspective I would have lost the moment. Excellent value for money, it is definitely not the lens I use most but I am fully satisfied. A flaw that creates some problems in the post are the flares still below the average of the competitors. I read about many who have had problems with sharpness, it seems that he was lucky. The lens also has an adjustment screw but at the moment it looks perfect like this.
Opinion:Purchased new for € 490 in the "light" version, "Firefly", it is the only real 10-11mm lens (not fisheye), existing for Pentax K-1, so having no other choice I took it because I do a lot of architectural photography, both interiors and buildings. I first obviously checked the presence of the distortion correction profile in "Camera Raw" which in my case, is indispensable and then I ordered it. Arrived yesterday I immediately did my tests and for distortion there is to say good that even with the correction disabled is very controlled, only that this is smoke in the eyes, precisely because for the kind of photography I do where the detail counts to the hundredth, the presence of strong chromatic aberration purple / magenta is a very serious defect and exceeds any potential value. I made a comparison one by one with the Samyang 14mm f2.8 in my possession doing both the 1/1 crop test then cropping the frame from 11mm up to 14mm and the classic one on the whole frame. Here, in Samyang the chromatic aberration without correction is just present at 98% and vanishes by 99.9% with the correction profile. In this Irix the presence of Purple / Magenta in the edges of the objects against the light already at 2/3 of a frame is 95-96% (in the edges) and drops very badly perhaps up to 98% of the contour in the backlight, remaining however too visible for the kind of work I do unless I reduce the resolution of the photograph from 36mpx to 10mpx or less. Another rather negative side is the original contrast of the photo in raw. I do not know how to say that it is sharp and contrasted, since both the 14mm Samyang and the 20mm are in comparison lenses that seem to explode details and colors. From this Irix the colors come out washed out and the contrast does not live up to the sensor of the K-1 ... Having said that maybe I keep it ... because I have no other choice, but having to resort every time to a very heavy post production to revive its characteristics and try with some miracle to make the purple / magenta fringes disappear. If you don't have the Pentax K-1, take something else because it's a barely decent lens. Rating 6.5.
Opinion:I have the firefly version in plastic, but it is not as poor as you might think, indeed the lens looks very solid and anything but light. Paired with the K1 they make a nice weight to wag around, I would have preferred one less diaphragm but a handling similar to the Voigtlander 10mm f/5.6 for example. The filters, as has already been said, fit from behind and are only available ND (3X3 cm, at a paltry cost), inserting filters is easy and intuitive while to remove them you need to use another filter to pry. I consider this Irix a very good and fun goal; it makes a lot of stuff in the frame and it gets more and more appreciated every time I use it, I'd buy it back.
Pros:(Blackstone version): well built, all metal, the whole world enters it. The Firefly version then weighs a little less.
Cons:Heavy (all metal), fixed lampshed and no way to mount screw filters, and mounting slab filters costs more than the lens itself.
Opinion:I took it used, with Nikon bayonet despite using Canon because I thought "so much with an adapter I solve and then an 11mm has all the depth of field in the world". Also to have it with Canon bayonet I would have to buy it again and it cost a lot more. It's actually not that easy to use with the adapter, but this is not Irix's fault but my ignorance of the matter. I took it for the times that canon 16-35 is not enough, I had it in the four days in Venice or in the three days in the castles of the duchy of Parma and Piacenza. Heavily vignette, it is sharp in the center and loses sharpness going towards the edges and corners. It does not mount screw filters, and to use slab filters you have to prepare for a bloodletting: over 400 dollars for the holder and over 500 dollars for A GND8 slab ... I don't think I'm going to buy either holder or slabs. It mounts very cheap 30mm rear slab filters, on the site they cost 10 Euros, but of course they are only ND. Personally I consider it a nice toy, but, accustomed to zooming, sooner or later I will have to replace it with the Sigma 12-24 Art (canon 11-24 costs too much). Update of 2019: I took the Sigma 12-24 Art ... the weight is even greater, but the yield is a whole different story.
Pros:Breadth of field, excellent sharpness in the center, price, low distortion, easily correctable chromatic aberrations
Cons:Sharpness at the edges poor and pitiful at the extremes, heavy, locking ring MAF too plasticose
Opinion:I just took this lens and the first impressions are very good, especially with regard to the definition in the center. At the extremes loses much of incisiveness. The chromatic aberrations, especially at the edges, are present, but with Lightroom I noticed that they are corrected automatically without any particular problems. No problem even with regard to distortions, which are decidedly reduced for the type of lens and easily correctable in pp. In this regard, you can download the lens profile for Lightroom/camera raw directly from the official website. At the price at which it is offered (I have the "poor" Firefly version) I would say it is a good lens, which offers possibilities that very few other lenses offer and at considerably higher prices. In the end the real flaw is given by the weight and footprint.
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The following opinions have been automatically translated with Google Translate.
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