Flash, Studio lighting & Filters

Light Diffusor

The Lightsphere Flash Diffusion System
J. Ramon Palacios (jrp) reviews the Gary Fong Lightspere flash diffusers

Flashlights

The Teddy Bear Test
Getting the most out of your Nikon Speedlights

Filters 

What filter system
Selecting a screw-in or a slide-in system or a mix

UV, Haze and Skylight filters
Protecting your lens and getting sharper images

Neutral density and color graduated filters
Getting the right exposure under tricky light

Diffusion - Softening filters
Making people look better

Rotating filters and hoods
A solution to using rotating filters with modern deep scalloped hoods
By Nikonian Don Ferrario (nikonlinks.com)