After reviewing so many websites i found that there will be always distortion in most of the lenses(especially in case cheaper lenses Ex: 18-105mm).
q1 : can i get rid of these distortions in Photoshop ??
i. barrel distortion ?
ii. pincushion distortion ??
q2 : Vignetting - how to overcome this problem in Photoshop
If i check sample images in dpreview, pixel-peeper, fliker for particular lens ... they are flawless.
can any masters please through some light on this issue