Like everybody else, we’re pretty excited to get our hands on Canon’s new 5DS and 5DS R. There are already a lot of hands-on articles about the cameras that probably have told you more than you need to know to make your purchase decision. Of course, for most of the Canon shooters who read this blog, the purchase […]

The Optikos Bench First and foremost, if you aren’t at least a little Geeky, this post is not for you; unless you’re one of those people who thinks “just take some pictures, dammit,” when I write some article about resolution testing.  In that case, you might like this article because we’re taking pictures to test […]

What is Decentering and What Does it Do? Strictly speaking, decentering would involve one or more of the lens elements being off of the central axis of the lens. This would prevent the curved surfaces of the lens from bending the light properly. In severe cases it could result in halos or ghosting. In most […]