Lens distortion is produced by optical aberration within the glass. Straight lines in reality appears to be curved or deformed in the image. Straight lines are very important in architectural photography. I seen more heavy lens distortion in wide angle and zoom lens than in prime lens. The 3 main types of lens distortion are: barrel, pincushion, and complex. This can be fixed manually in RAW image processing softwares like Lightroom.
Perspective distortion, also known as converging verticals, is produced by where/how the camera is placed in relation to the subject. This can be fixed using a tilt-shift lens or in post production. Always start with lens distortion, then perspective correction.
Stay tuned for how to fix distortions for architectural and interiors photography. Thank you for reading. Until next blog!
-xoxo, L