Technical Notes

Test Cards – Basic adjustment of monitors and projection systems
Avoiding Parallax Problems – When to use a panoramic head
Simple Panoramic Head – Home made panoramic head solves parallax problems
How to Measure the Focal Length of a Lens – Zoom lenses are not always what they seem
Monitor Adjustment: Measuring Gamma – An absolute method, no calibration needed
How the Nature of Light affects the performance of digital cameras – A look at diffraction blur and how the image gets softer as the aperture is reduced