As a time saver, here are links to things I've reviewed. Highlighted links are completed reviews, other items are not done yet.
Cameras:
Canon vs. Nikon Ergonomics
Olympus Stylus 550WP
Nikon D7000 High ISO Test
User Interface: D7000 vs. D300s
Lenses:
Lens reviews can be sub-divided into two categories, APS-C and Full Frame formats. For the full frame reviews, consider mid frame test images to be corners on APS-C.
Thee World's Best Camera Lens Focal Length Comparison Tool
Weather Resistant Nikon Lenses
Weather Resistant Sigma Lenses
How to Identify the 4 Different Tokina 28-70 Lenses
Full Frame
Nikkor 120 f4 Medical Micro
Sigma 100-300 f4 DG HSM APO
Tokina 28-70 f2.8-2.6 AT-X PRO
Sigma 24-104 f4 DG OS HSM Art
Sigma 35 f1.4 DG HSM Art
Nikkor 200mm f4 AI Micro
Nikkor 28 f1.4D Aspherical
Tokina 17mm f3.5 ATX-PRO
Tokina 80-400 f4.5-5.6 AT-X
Nikkor 50 f1.4D
APS-C
Tokina 80-200mm f2.8 AT-X
Tokina 100mm f2.8 Macro AT-X PRO
Tamron 28-200 f3.8-5.6
Canon 70-200 f2.8L IS USM Mark I
Canon 28-135mm f3.5-5.6 IS USM
Canon 85mm f1.8 USM Lens
Posts
