Whenever I hear doom and gloom stories about AI taking over the world — whenever scientists kick the bucket of “What is Machine Learning vs Artificial Intelligence” down the road — I refer back to my thought experiment about the birth of AI. The Thought Experiment You work for NASA and you’re building…

Focal length is the distance of the focus. Imagine a pinhole camera. It’s just a box with a pinhole in one side. Light rays converge at the pinhole & create a mirrored image on the rear surface of the box. In this example, the pinhole is the lens and the…

Let’s start with the eye. The eye is — for the purposes of this discussion a sphere. Focused light comes through the lens and reaches the retina where light sensitive photoreceptors turn that light into electrical signals. When people try to define what a “normal” lens is, they often go back to the human eye…

A bit of a departure from my usual vintage lens reviews, I purchased the 7Artisans 28mm 1.4 after looking at some of the sample photos online. I love a good wide aperture prime, and while 28mm isn’t my preferred focal length, if there’s a wide aperture version I’m very much…

I have a weakness for fast vintage lenses. These aren’t meant to be reviews so much as real world samples with a bit of commentary — to help you decide whether or not this lens is for you (and to remind me of the character of each lens before I…

I have a bit of an obsession with fast vintage lenses. Lucky for me, vintage lens manufacturers had a bit of an obsession with making fast lenses. I already own and love the Minolta 85mm f/1.7 so when I learned about the 58mm f/1.2 …

Sigma's Foveon sensor is unique. Fujis'x X-Trans CFA is also unique. How do they compare?

Brand Equity Brand Equity can be thought of as the value of consumers’ opinions about your brand. The higher the value of your brand in their mind, the more equity you have. …