Photography started taking off right after Texas independence, so early 1840s. This photo was taken in 1843, so over a decade after Adams was president. Incidentally, it's not even the only photograph of him, just one of the earliest.
You know, I constantly wonder how close portraits were to what people actually looked like. It's easier to tell with people like Washington and Napoleon, because there are so many portraits and you can see what is consistent among them. For folks who there is just one portrait of, it's hard to be sure, but when you do find pictures like these, it generally lines up with the images.
Here is a comparison. The photo is a little later in life, but these portraits are pretty much dead on:
![](http://www.history.com/images/media/slideshow/john-quincy-adams/john-q-adams-portrait.jpg)
We can also look at early photos to get a better idea of what pre-photograph people looked like. A case in point is Juan Seguin. There are no photos of him in Republic of Texas days, but there is one from a couple of decades later:
![](http://img.photobucket.com/albums/v291/Nefarioso/seg2.jpg)
Or Andrew Jackson, a pre-photo president who lived into the photo era:
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Andrew_Jackson_Daguerrotype-crop.jpg/220px-Andrew_Jackson_Daguerrotype-crop.jpg)
[This message has been edited by aalan94 (edited 2/12/2013 1:10p).]
[This message has been edited by aalan94 (edited 2/12/2013 1:12p).]