Author: Jon Tarrant

Jon Tarrant contributed camera lens reviews to Trusted Reviews between 2008 and 2014.

Tamron 18-270mm (non-PZD) super-zoom

I've just been testing the new PZD version of Tamron's 18-270mm super-zoom and I've realised that when the review of...

Feb 13, 2011

Why is some light transmitted and some light reflected at a glass surface? This is a surprisingly difficult question to...

Mar 2, 2011

Most of the effect that a lens has on the light passing through it comes from the surface curvature of...

Mar 6, 2011

Having covered a couple of real-world observations of the behaviour of light it seems appropriate to look at some of...

Mar 11, 2011

We have an explanation for why light bends when it moves across a boundary between two different media but is...

Apr 17, 2011

Drawing on the two previous postings in this 'blog we are now able to create a basic model for image...

May 2, 2011

There are several different colour problems that affect lenses but the one we are interested in here is known as...

Jun 13, 2011

Have you ever wondered what constitutes an education in photography? What are the topics and facts that examination boards and...

Jul 3, 2011

The latest edition of Camera Lens News, from Carl Zeiss, has just been published and includes a feature on Planar...

Jul 24, 2011