I mentioned in my blog about the barrel distortion that occurred with the Canon 16-35mm lens at 16mm.  I thought I would share an actual comparison photo.  I don't want to suggest that the 16 is bad.  But I would apply correcting software on any of the images as it makes them look truer and better.

So, if you can't "see" the distortion, here's an overlay.  I've put a black outline of the CORRECTED PHOTO on top of the uncorrected photo.  The red arrow shows where I lined everything up, and you'll notice that the verticals from the two photos differ as you move out from the center of that red arrow point.

It becomes really apparent in a mouseover example, but I don't think I can do that on AR.  If you look at the vertical lines around the fireplace in the first photo, you'll see that the fireplace looks more oval than rectangular.  I realize that I may be being picky, but I guess I look at photos a lot.

For correction software, I used the PTLENS photoshop filter which seems to do a good job.

Margaret Hokkanen, Carlsbad Real Estate