[robski]

It seems that my approach is much the same as Stephens. Generally the amount is kept below 50 with a radius of 1. Keeping an eye on any areas where the local contrast starts to increase dramatically. The threshold I keep between 0 and 5 dependent of noise levels in the image.

Over the years as I've upgraded the quality of the glass the degree of sharping I need to do is much reduced compared to budget glassware shots.

This pretty well falls in-line with Mike's Figures from the book.