Apparently, this user prefers to keep an air of mystery about them.
22 Do DSLRs play games with ISO when used with fast lenses? Oct 31 '10
16 Why is the depth-of-field preview in the optical viewfinder of my Canon 500D inaccurate? Oct 24 '10
11 Where is this dust located on my sensor? Dec 21 '11
9 How to set correct exposure in low light condition Nov 23 '14
7 What are the RGB values that correctly represent a 5800 K white surface on a calibrated 6500 K monitor? May 21 '12