Quote Originally Posted by HDNitehawk View Post
I think its not you, it is the lens.
I think you are referring to the distortion a wide angle lens has. That is common at wide angles.
See this chart.
If you are using LR to PP I believe it has a function that can correct this if you so choose.

http://www.the-digital-picture.com/R...istortion.aspx
The lens i am using is Sigma 10-20mm f/4-5.6 EX DC HSM and looked up the picture and yes had used the lens correction for it also.