How much does light bend?
We have an explanation for why light bends when it moves across a boundary between two different media but is...
X-Archive
Image Formation
Drawing on the two previous postings in this 'blog we are now able to create a basic model for image...
Chromatic Aberration
There are several different colour problems that affect lenses but the one we are interested in here is known as...
Photography in Education
Have you ever wondered what constitutes an education in photography? What are the topics and facts that examination boards and...
Planar Lenses
The latest edition of Camera Lens News, from Carl Zeiss, has just been published and includes a feature on Planar...
CSI Photographs
Television dramas such as the CSI series take many liberties with photographs, especially when it comes to forensic analysis, so...
Wedding Photography
If you had to photograph a wedding using only one lens then which lens would it be? Having taken a...
Tamron 18-270mm EISA Award
Tamron’s new 18-270mm, with its piezoelectric motor, was named EISA’s European Zoom Lens of the Year 2011-12. Yet the same...
Visual sharpness
Numerical testing and visual sharpness are two very different things. Of the two, visual sharpness is probably more important but...