Zeiss Camera Lens News
If you’re looking for some interesting reading during the holidays then look no further than Zeiss Camera Lens News. The...
X-Archive
Pinhole Quality
Some time ago I discussed the optimum size for a pinhole to be used in digital pinhole-camera photography. I’ve now...
Fixed or Variable Aperture?
You may sometimes have a choice between two similar lenses; one with a fixed aperture, the other with a variable...
Telescope lenses
Why do astronomers use telescopes? The answer is NOT “to make distant things look closer” but rather to make fainter...
Graham Saxby’s Science of Imaging
Good books on The Science of Imaging are few and far between but Graham Saxby’s is one of the best....
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...
Reflected Light
Why is some light transmitted and some light reflected at a glass surface? This is a surprisingly difficult question to...
Surface Curvature
Most of the effect that a lens has on the light passing through it comes from the surface curvature of...
Why does light “bend”?
Having covered a couple of real-world observations of the behaviour of light it seems appropriate to look at some of...