We just got an SL1 and it seems like the images are much wider than they are high, so wide that they look funny. When you take a vertical picture, the image looks very tall and skinny when viewed on the computer. We have it set to the 18mp high quality setting and the pixels match what the camera says, but it doesn't look right on any screen.
When I resize regular landscape images for my blog to 2000px wide, the height is only 1333px.
Typically when I resize them (on my old point and shoot) they would be 2000px x 1500px. 167 pixels is a lot once you get down to uploading lanscape images to places like pinterest.
This narrow appearance also makes pictures look funny when uploaded anywhere to the web, like facebook or craigslist.
Any help/insight would be greatly appreciated.
See image below, extra tall and skinny....
You may have changed the aspect ratio to 16:9. Reset it to original 3:2. Check your manual page 162.
Online manual can be found here: http://gdlp01.c-wss.com/gds/5/0300010915/01/eos-rebelsl1-100d-im-en.pdf