Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: How is the lens for architecture at the widest aperture? Any distortion?
Document: One thing:  this lens is heavy...and I noticed a slight perspective distortion in one of my pics at the widest setting. Only used the lens on this one occasion and I loved it.
Sharp. No vignetting at widest (14mm.) f 2.8 is consistent through focal lengths. Typical fisheye distortion controllable (to an extent) by parallel focal plane:subject composition. Care must be taken with exposed front element and heavy. Favorite lens even compared to 30+ yrs worth of collected glass. No regrets. Good service Amazon.
It's expensive.my conclusionIf you have to have the widest, fastest,  best optical quality zoom for a full frame nikon mount camera this is it. If you have an aps  ( 'C' size more or less) sensor camera you might want to look at other options since  there are clear compromises made to get the near perfect full frame performance this lens has.
I just used it to take pictures of michigan lake.1. Disadvantage is that it's not easy to focus at unlimited distance and Imaging efficacy isn't so sharp under this case.2. Suggestion is to try to identify a proper aperture size and use manual focus.
Gorgeous super sharp WA lens. Sharp corner to corner, at wide open aperture, at entire zoom range. The color is just pop. It is better than my AFS 17-35 (sharp only in the center, at wide open, need to stop down for sharper entire frame).At 1st, I kind of reluctant to try it since I have 17-35 already. But after I tried it, holly smokes, I MUST to have it.
Very little barrel distortion for such a wide lens. Holds focus thru the zoom range, which is nice. Extremely sharp.
This is a great lens... a must have.... at 14mm little distortion  beautiful color contrast and sharpness All I can say is it works very well for me. Landscapes and architectural exterior as well as the interior
Great optics low distortion just and all around great lens. I own the 2.8 set and this truly adds a new perspective on your photos. A lot of unique images can be created
This lens is simply breathtaking. Sharpness, contrast, build quality and (lack of) distortion are all world-class.If you can afford it, don't waste a second considering other super-wides for your full-frame Nikon. There is nothing better.
Super-sharp wide-angle doesn't get any better on a full-frame 35mm camera. This lens is also excellent on a DX body, just not quite as wide. Very low distortion, no CA or fringing, and razor sharp.
Answer: This is one of the best lens I ever used in every aspect. There is some distortion especially at 14 mm but nothing that couldn't be automatically corrected during the import phase using the exif data. So I wouldn't worry to much. The main problem you could get for architecture photography is that the keystone effect is more visible with a wide angle lens, but this is a general problem, nothing to do with the lens itself, and could be an effect that you are looking for.