Sigma’s Art series of lenses are already praised for their image quality and sharpness, but you can hone that sharpness even more by adjusting the focus of your lens using Sigma’s USB Dock. Photographer Kyle Kozinski recently discovered just how much of a difference it can make.
Kozinski noticed that his $799 Sigma 18-35mm f/1.8 Art lens was slightly off in its focusing, so he shelled out $60 for a Sigma USB Dock.
“Everything up to close to infinity was front focusing and then at infinity it was back focusing,” Kozinski writes. After calibrating his lens’ focus with the USB Dock and Sigma Optimization Pro software, Kozinski saw a night and day difference.
Here are two 100% crops from photos shot with the lens before and after calibrating the focus:
As you can see, the lens now focuses correctly on the text found on the side of the drill driver instead of slightly toward the front or back. This tight, accurate focus is especially helpful for things like shooting portraits with a very shallow depth of field, when you want to ensure that your subject’s eyes are tack sharp.
Many modern digital cameras feature a AF Microadjustment feature for fixing similar focusing issues, but Sigma’s system goes a step beyond.
“The dock allows multiple adjustment values over different focal lengths and focusing ranges whereas the micro adjustment is the same value for everything,” Kozinski explains.
You can find more of Kozinski’s work on his website, Facebook, and Instagram.
Image credits: Comparison photos by Kyle Kozinski and used with permission
We’ve mentioned Sigma’s upcoming revolutionary USB dock before, but until today we had no idea when the product would become a reality or how much it would cost. Thankfully, Sigma has cleared that up for us, and thrown in a demo video to boot.
According to a Sigma press release, the new USB dock will hit digital shelves in early May for a street price of $60 and an MSRP of $80. The dock has people excited as it seems to be the first product of its kind, and Sigma lens users have been itching to get their hands on it ever since news broke of its existence.
Customizations and firmware updates will be done using Sigma’s Optimization Pro software, which will launch alongside the new dock. The dock/software combo will allow you to toy around with Sigma’s entire Global Vision lineup. You’ll be able to update firmware and adjust focus settings for all of the lenses, while additional adjustments such as tweaks to AF speed, adjusting OS functions and a focus limiter will be limited to sports lenses.
Speaking of sport lenses, Sigma also announced that a new Global Vision Sports lens will release alongside the USB dock in May. The new 120-300mm f/2.8 DG OS HSM Sports lens from Sigma will be a bit pricier though, tipping the scales at an MSRP of $3,600.
Check out the demo video at the top or follow the links to Sigma’s website for more details on the upcoming dock and/or lens.