4. Frequency Analysis of Optical Imaging Systems (Chapter 6)
Finding a complete, official solution manual can be difficult as they are often restricted to instructors. However, by mastering the and the transfer function of free space , you can derive the majority of the answers in the 3rd edition.
Use properties like circular symmetry to convert 2D integrals into 1D Hankel Transforms (using Bessel functions). This is often the "shortcut" intended by the author.