Photo Art from Science

Contrast-detect focus is supposed to be superior to phase-detect focus accuracy, right? Let's reality-test this notion.

Old Nikkor zoom from the 1990's is better than you'd expect. Get some real measurement results on how good.

This lens harkens back to the early era of Nikon zoom lenses, when everyone was still using 35mm film. It was manufactured from 1989...

How to see the zone of what's in focus with your lens when it isn't a flat field.

Lenses don't always focus different colors equally. I show you how to see and measure lens resolution in the red, green, and blue channels.

Detailed analysis and tips on how to make best use of this 10-stop neutral density filter.

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.