Using this technique I will show you my full workflow and give you the raw files of one of favorite photos of the year – here is how I did it:
1. I put on an ND filter from BW:
2. Set to 37mm so that I don’t get any lens distortion, I took 18 photos of the Walt Disney Concert Hall in Downtown Los Angeles, each photo had an average of 120 seconds of exposure at 50 ISO and F22.
3. I used Autopano Pro to stitch the photos together.
4. Then, I used Tonality Pro to do a black and white conversion, but I advise you to buy their kit – they currently have an amazing deal: