How do I correct Barrel distortion, in Vertical Panorama?

[Photographer 53]

Created a vertical panorama from 7 images taken with 50mm lens, each image shows some distortion, but when stitched the image has barrel distortion.  How do I prevent or correct the effect?

[NotMyFault]

It is possible to correct the distortion with help of a life mesh war filter. A grid can help to match straight lines.

To avoid the issue, all images must be taken from one fixed point (tripod). Do not stitch images taken from different locations, e.g. height in this example.

 

[NotMyFault]

Next, if possible take RAW images and check that camera and lens are automatically identified in Develop persona, correcting any lens distortion.

You may get better results pre-processing the RAW images and exporting to tiff before stitching 

[Ldina]

@Photographer 53 Another option is to bring the image (RAW or Pixel layer) back into the Develop Persona, then using the "Lens Panel" adjust the "Distortion" slider. In the attached screenshot, I adjusted the Distortion to -32. If shooting RAW, that's a good place to reduce some of that distortion, especially if you don't have a lens that doesn't have lens correction data.

As @NotMyFault mentioned, use camera lens correction if possible and that should correct the image to a large extent. As can be seen in my screenshot, the top and bottom of the image are now warped in trying to get the sides more or less straight, so the warp filter in the Photo Persona is a great option.

[Photographer 53]

@NotMyFault @Ldina  Thanks to you both for the suggestions, I am currently experimenting with the Lens Panel & Warp filter, quick tests have produced good results, I found that processing the individual raw images helps eliminate the distortion, then after stitching any left over distortion can be sorted more easily.