Photo Art from Science

Learn about an easy way to accurately measure lens focus speed using in-camera video.

You can see wildly-varying lens resolution measurements for the exact same lens model out there on the internet. This may be why.

Do you really need to turn off lens vibration reduction on a tripod? Get some real answers to this question.

If you have a lens that generates that dreaded hotspot in the middle of your photos when you try infrared photography, you can fix it.

Clear up the confusion between Nikon Custom Settings Banks and Photo Shooting Banks. How to use those banks effectively.

Did you ever wonder how they decided upon camera lens f-stop numbering? Lots of interesting facts about lens f-stops and more.

Demystify how lens optical stabilization actually works. Learn amazing facts about the technology and history behind lens vibration reductio

The Lightroom mask called “Radial Filter” is much more useful than you think. Learn more about it here.

If you buy Sigma’s USB dock to reprogram their lenses, it gives you the option to not only update their lens focus firmware, but also which focus algorithm(s) to choose. It’s almost like buying a new lens. If you have never programmed your Sigma lens using their dock, then your only focus choice is “Standard AF”. You get to choose among three different “AF Speed Settings” if you program their lens via the “Sigma Optimization Pro” program. The choices are “Fast AF Priority”,

Make a rugged and perfectly functional flash diffuser for free. Here's how to do it and why you want one of these.