So I purchased one of the new Sigma 18-300mm F3.5-6.3 DC MACRO OS HSM Contemporary lenses for my Canon T1i and the USB dock to make adjustments/updates. There is some definite back focusing at middle ...

We first heard about Sigma’s innovative USB Dock last year at Photokina, and we’ve been curious about how the accessory will work ever since. This $60 gadget lets you connect your lens to your ...

Images, and the devices that capture them, are my focus. I've covered cameras at PCMag for the past 14 years, which has given me a front row seat for the changeover from DSLRs to mirrorless cameras, ...

The Sigma USB Dock makes it easy to perform microfocus adjustments and customize some behaviors of recent Sigma lenses.